23100031021 has 4 divisors (see below), whose sum is σ = 23845193344. Its totient is φ = 22354868700.

The previous prime is 23100030971. The next prime is 23100031027. The reversal of 23100031021 is 12013000132.

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 23100031021 - 2¹⁵ = 23099998253 is a prime.

It is a super-2 number, since 2×23100031021² (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 = 23100030992 and 23100031010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23100031027) 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, 372581115 + ... + 372581176.

It is an arithmetic number, because the mean of its divisors is an integer number (5961298336).

Almost surely, 2^23100031021 is an apocalyptic number.

It is an amenable number.

23100031021 is a deficient number, since it is larger than the sum of its proper divisors (745162323).

23100031021 is an equidigital number, since it uses as much as digits as its factorization.

23100031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745162322.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 23100031021 its reverse (12013000132), we get a palindrome (35113031153).

The spelling of 23100031021 in words is "twenty-three billion, one hundred million, thirty-one thousand, twenty-one".