This nBAB for the number

2011was created on 1 January2011.MathBabbler Number Analyst (MBNA) output: ========================================= 2011 is a natural, whole, integer 2011 is odd 2011 proper divisors are: 1, 2011 is deficient (sum of divisors is 1) 2011 is unhappy 2011 is not a Harshad number 2011 is prime ...Sexy prime with 2017 ...OEIS:002145 (4n+3; n=502) ...Left-truncatable 2011 is the sum of 11 consecutive primes 2011 = 157 + 163 + 167 + 173 + 179 + 181 + 191 + 193 + 197 + 199 + 211 2011 in octal is 03733 2011 in hexadecimal is 0x7db 2011 in binary is 11111011011 (is odious) 2011 nearest square numbers: -75...14 (1936...2025 [45]) sqrt(2011) = 44.8442 ln(2011) = 7.60639 log(2011) = 3.30341 2011 reciprocal is .00049726504226752859273993038289 2011! is inf 2011 is 640.121 Pi years 2011 is 100 score and 11 years 2011 written as a Roman numeral is MMXI 2011 = 1006^2 - 1005^2 and 1006 + 1005 = 2011## Side-bar: Tidbit About Prime Numbered Years

The following are prime numbered years in 21st century: 2003,

2011, 2017, 2027, 2029, 2039, 2053, 2063, 2069, 2081, 2083, 2087, 2089 and 2099. The first prime numbered year in the 22nd century is 2111.

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 01 January 2011

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