23131021131 has 24 divisors (see below), whose sum is σ = 33566851760. Its totient is φ = 15349093056.

The previous prime is 23131021099. The next prime is 23131021171. The reversal of 23131021131 is 13112013132.

It is not a de Polignac number, because 23131021131 - 2⁵ = 23131021099 is a prime.

It is a super-2 number, since 2×23131021131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131021171) 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, 2534805 + ... + 2543913.

Almost surely, 2^23131021131 is an apocalyptic number.

23131021131 is a deficient number, since it is larger than the sum of its proper divisors (10435830629).

23131021131 is a wasteful number, since it uses less digits than its factorization.

23131021131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10395 (or 10392 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 23131021131 its reverse (13112013132), we get a palindrome (36243034263).

The spelling of 23131021131 in words is "twenty-three billion, one hundred thirty-one million, twenty-one thousand, one hundred thirty-one".