**2011**is a prime number.

**2011**has the representation 2

^{11}- 37.

**2011**is the sum of 11 consecutive primes:

**2011**= 157 + 163 + 167 + 173 + 179 + 181 + 191 + 193 + 197 + 199 + 211.

**2011**is a number such that first reversing the digits and then squaring equals the result of first squaring and then reversing the digits: 1102

^{2}=1214404 and

**2011**

^{2}= 4044121.

2

^{8}is**2011**in base 5.The sum of the digits of

**2011**is equal to the number of digits: 2 + 0 + 1 + 1 = 4. The digit sum is a square and a power of 2.**2011**. Note that 222011 is a prime.

In the

*Aeon Flux*television series and film (2005), 99 percent of the world's population is wiped out by a mysterious virus in the year**2011**.The Peace Corps marks its 50th anniversary in the year

**2011**. It is also the 5oth anniversary of the first manned mission to space.**2011**is the 100th anniversary of the launch of the

*Titanic o*n May 31, 1911.

**2011**is designated the International Year of Chemistry.

Source: Prime Curios!