23031123131 has 4 divisors (see below), whose sum is σ = 23033710272. Its totient is φ = 23028535992.

The previous prime is 23031123109. The next prime is 23031123149. The reversal of 23031123131 is 13132113032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23031123131 - 2¹⁸ = 23030860987 is a prime.

It is a super-2 number, since 2×23031123131² (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 (23031123191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280171 + ... + 1298036.

It is an arithmetic number, because the mean of its divisors is an integer number (5758427568).

Almost surely, 2^23031123131 is an apocalyptic number.

23031123131 is a deficient number, since it is larger than the sum of its proper divisors (2587141).

23031123131 is an equidigital number, since it uses as much as digits as its factorization.

23031123131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587140.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 23031123131 its reverse (13132113032), we get a palindrome (36163236163).

The spelling of 23031123131 in words is "twenty-three billion, thirty-one million, one hundred twenty-three thousand, one hundred thirty-one".