111123133121 has 96 divisors (see below), whose sum is σ = 153274834944. Its totient is φ = 78376636800.

The previous prime is 111123133109. The next prime is 111123133193. The reversal of 111123133121 is 121331321111.

It is not a de Polignac number, because 111123133121 - 2⁶ = 111123133057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111123133093 and 111123133102.

It is not an unprimeable number, because it can be changed into a prime (111123133321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 240006536 + ... + 240006998.

It is an arithmetic number, because the mean of its divisors is an integer number (1596612864).

Almost surely, 2^111123133121 is an apocalyptic number.

111123133121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111123133121 is a deficient number, since it is larger than the sum of its proper divisors (42151701823).

111123133121 is a wasteful number, since it uses less digits than its factorization.

111123133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883 (or 872 counting only the distinct ones).

The product of its digits is 108, while the sum is 20.

Adding to 111123133121 its reverse (121331321111), we get a palindrome (232454454232).

The spelling of 111123133121 in words is "one hundred eleven billion, one hundred twenty-three million, one hundred thirty-three thousand, one hundred twenty-one".