201 (two hundred ndone) is the

natural number In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive in ...

following 200 and preceding 202.

In mathematics

As the two proper factors of 201 are both

Gaussian prime In number theory, a Gaussian integer is a complex number whose real and imaginary parts are both integers. The Gaussian integers, with ordinary addition and multiplication of complex numbers, form an integral domain, usually written as \mathbf /ma ...

s, 201 is a Blum integer.

In computing

* 201 is an

HTTP HTTP (Hypertext Transfer Protocol) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web, wher ...

status code indicating a new resource was successfully created in response to the request, with the textual part of the response line indicating the

URL A uniform resource locator (URL), colloquially known as an address on the Web, is a reference to a resource that specifies its location on a computer network and a mechanism for retrieving it. A URL is a specific type of Uniform Resource Identi ...

of the newly created document.

In other fields

* 201 is the course number of basic or entry-level courses at some

Canadian Canadians () are people identified with the country of Canada. This connection may be residential, legal, historical or cultural. For most Canadians, many (or all) of these connections exist and are collectively the source of their being ''C ...

universities (such as the

University of Calgary {{Infobox university , name = University of Calgary , image = University of Calgary coat of arms without motto scroll.svg , image_size = 150px , caption = Coat of arms , former ...

and

Athabasca University Athabasca University (AU) is a Canadian public university that primarily operates through online distance education. Founded in 1970, it is one of four comprehensive academic and research universities in Alberta, and was the first Canadian ...

), especially if the number 101 is allocated to remedial courses. * 201 is also short for 201 Poplar, the jail in Memphis,

Tennessee Tennessee (, ), officially the State of Tennessee, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Kentucky to the north, Virginia to the northeast, North Carolina t ...

, and alluded to in many rap songs from Memphis artists. Integers {{Num-stub