23231113021 has 4 divisors (see below), whose sum is σ = 24453803200. Its totient is φ = 22008422844.

The previous prime is 23231113013. The next prime is 23231113043. The reversal of 23231113021 is 12031113232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23231113021 - 2³ = 23231113013 is a prime.

It is a super-2 number, since 2×23231113021² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1222690159 = 23231113021 / (2 + 3 + 2 + 3 + 1 + 1 + 1 + 3 + 0 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23231113021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23231113421) 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, 611345061 + ... + 611345098.

It is an arithmetic number, because the mean of its divisors is an integer number (6113450800).

Almost surely, 2^23231113021 is an apocalyptic number.

It is an amenable number.

23231113021 is a deficient number, since it is larger than the sum of its proper divisors (1222690179).

23231113021 is a wasteful number, since it uses less digits than its factorization.

23231113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222690178.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 23231113021 its reverse (12031113232), we get a palindrome (35262226253).

The spelling of 23231113021 in words is "twenty-three billion, two hundred thirty-one million, one hundred thirteen thousand, twenty-one".