23021320131 has 12 divisors (see below), whose sum is σ = 33749332552. Its totient is φ = 15118478496.

The previous prime is 23021320123. The next prime is 23021320139. The reversal of 23021320131 is 13102312032.

It is an interprime number because it is at equal distance from previous prime (23021320123) and next prime (23021320139).

It is not a de Polignac number, because 23021320131 - 2³ = 23021320123 is a prime.

It is a super-2 number, since 2×23021320131² (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 (23021320139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19088386 + ... + 19089591.

Almost surely, 2^23021320131 is an apocalyptic number.

23021320131 is a deficient number, since it is larger than the sum of its proper divisors (10728012421).

23021320131 is a wasteful number, since it uses less digits than its factorization.

23021320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38178050 (or 38178047 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23021320131 its reverse (13102312032), we get a palindrome (36123632163).

The spelling of 23021320131 in words is "twenty-three billion, twenty-one million, three hundred twenty thousand, one hundred thirty-one".