23131133121 has 24 divisors (see below), whose sum is σ = 32589216000. Its totient is φ = 14591618784.

The previous prime is 23131133117. The next prime is 23131133161. The reversal of 23131133121 is 12133113132.

It is a happy number.

It is not a de Polignac number, because 23131133121 - 2² = 23131133117 is a prime.

It is a super-2 number, since 2×23131133121² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23131133161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 922255 + ... + 947003.

It is an arithmetic number, because the mean of its divisors is an integer number (1357884000).

Almost surely, 2^23131133121 is an apocalyptic number.

It is an amenable number.

23131133121 is a deficient number, since it is larger than the sum of its proper divisors (9458082879).

23131133121 is a wasteful number, since it uses less digits than its factorization.

23131133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25653 (or 25634 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 23131133121 its reverse (12133113132), we get a palindrome (35264246253).

The spelling of 23131133121 in words is "twenty-three billion, one hundred thirty-one million, one hundred thirty-three thousand, one hundred twenty-one".