211 (two hundred
ndeleven) 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
210 and preceding
212. It is also a
prime number
A prime number (or a prime) is a natural number greater than 1 that is not a Product (mathematics), product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime ...
.
In mathematics
* 211 is the sum of three consecutive
prime
A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways ...
s (
), a
Chen prime, a
centered decagonal prime, and a
self prime.
* 211 is the smallest prime separated by 12 from the nearest primes (199 and 223). It is thus a
balanced prime and an ''
isolated prime''.
*211 is a
repdigit
In recreational mathematics, a repdigit or sometimes monodigit is a natural number composed of repeated instances of the same digit in a positional number system (often implicitly decimal). The word is a portmanteau of "repeated" and "digit".
Ex ...
in
tetradecimal
There are many different numeral systems, that is, writing systems for expressing numbers.
By culture / time period
"A ''base'' is a natural number B whose ''powers'' (B multiplied by itself some number of times) are specially designated wit ...
(111).
* 211 is the 47th prime number and therefore it is a
super-prime
Super-prime numbers, also known as higher-order primes or prime-indexed primes (PIPs), are the subsequence of prime numbers that occupy prime-numbered positions within the sequence of all prime numbers. In other words, if prime numbers are matched ...
.
In other fields
211 is also a nickname for
Steel Reserve, a
malt liquor
In the United States of America, Malt liquor is a type of mass market beer with high alcohol content, (typically above 5%), made with malted barley and resembling those for American-style lagers.
Manufacture
Malt liquor is a strong lager or ale ...
alcoholic beverage.
211 is also
SMTP
The Simple Mail Transfer Protocol (SMTP) is an Internet standard communication protocol for electronic mail transmission. Mail servers and other message transfer agents use SMTP to send and receive mail messages. User-level email clients typi ...
status code for system status.
References
Integers
{{num-stub
ca:Nombre 210#Nombres del 211 al 219