23131031123 has 4 divisors (see below), whose sum is σ = 23227813920. Its totient is φ = 23034248328.

The previous prime is 23131031117. The next prime is 23131031137. The reversal of 23131031123 is 32113013132.

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 23131031123 - 2¹⁰ = 23131030099 is a prime.

It is a super-2 number, since 2×23131031123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23131031095 and 23131031104.

It is not an unprimeable number, because it can be changed into a prime (23131031173) 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, 48391040 + ... + 48391517.

It is an arithmetic number, because the mean of its divisors is an integer number (5806953480).

Almost surely, 2^23131031123 is an apocalyptic number.

23131031123 is a deficient number, since it is larger than the sum of its proper divisors (96782797).

23131031123 is an equidigital number, since it uses as much as digits as its factorization.

23131031123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96782796.

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

Adding to 23131031123 its reverse (32113013132), we get a palindrome (55244044255).

The spelling of 23131031123 in words is "twenty-three billion, one hundred thirty-one million, thirty-one thousand, one hundred twenty-three".