111

Number
$111$ (one hundred and eleven) is:


 * $3 \times 37$


 * The $24$th lucky number:
 * $1, 3, 7, 9, 13, 15, 21, 25, 31, 33, 37, 43, 49, 51, 63, 67, 73, 75, 79, 87, 93, 99, 105, 111, \ldots$


 * A palindromic number whose square is also palindromic:

Also see

 * Square of Small-Digit Palindromic Number is Palindromic