23131221022 has 32 divisors (see below), whose sum is σ = 42719040000. Its totient is φ = 9147545568.

The previous prime is 23131221013. The next prime is 23131221031. The reversal of 23131221022 is 22012213132.

It is an interprime number because it is at equal distance from previous prime (23131221013) and next prime (23131221031).

It is a super-2 number, since 2×23131221022² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524629 + ... + 567007.

It is an arithmetic number, because the mean of its divisors is an integer number (1334970000).

Almost surely, 2^23131221022 is an apocalyptic number.

23131221022 is a deficient number, since it is larger than the sum of its proper divisors (19587818978).

23131221022 is a wasteful number, since it uses less digits than its factorization.

23131221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45400.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23131221022 its reverse (22012213132), we get a palindrome (45143434154).

The spelling of 23131221022 in words is "twenty-three billion, one hundred thirty-one million, two hundred twenty-one thousand, twenty-two".