MathBabbler allocated some time expanding the homepage for the nBABs collection. While doing this work he noticed that there were nBABs for the numbers zero through ten, but there wasn't an nBAB for the number eleven; therefore, this nBAB was created.

MathBabbler Number Analyst (MBNA) output: ========================================= 11 is a natural, whole, integer 11 is odd 11 is unhappy 11 is not a Harshad number 11 is prime ...Cousin prime with 7 ...Safe prime with 5 ...Sexy prime with 17 ...Sexy prime with 5 ...Sophie Germain prime with 23 ...Twin prime with 13 ...OEIS:002145 (4n+3; n=3) ...Super ...Palindromic ...prime triplet {5, 7, 11} ...prime triplet {7, 11, 13} ...prime triplet {11, 13, 17} ...prime quadruplet {5, 7, 11, 13} ...prime quadruplet {11, 13, 17, 19} 11 is undulating 11 in octal is 013 11 in hexadecimal is 0xb 11 in binary is 1011 (is odious) 11 nearest square numbers: -2...5 (9 [3]...16 [4]) sqrt(11) = 3.31662 ln(11) = 2.3979 log(11) = 1.04139 11 reciprocal is .09090909090909090909090909090909 11! is 3.99168e+07 11 is 3.50141 Pi years 11 is 0 score and 11 years

`written as a Roman numeral is`

11`.`

XI

11 = sqrt(121)

`is the smallest two-digit prime number.`

11Apollo

`was the first manned spacecraft to land on the Moon.`

11Terrorists attacked the U.S. homeland on

`September 2001.`

11

`is used in numerology. Hmmm... I wonder if this nBAB will still exist at`

11:11`on`

11:11`.`

11/11/11

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

**Created:** 12 November 2008

This work is licensed under a Creative Commons Attribution 3.0 United States License.