23021312031 has 12 divisors (see below), whose sum is σ = 33263384752. Its totient is φ = 15342751296.

The previous prime is 23021311993. The next prime is 23021312033. The reversal of 23021312031 is 13021312032.

It is not a de Polignac number, because 23021312031 - 2¹³ = 23021303839 is a prime.

It is a super-2 number, since 2×23021312031² (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 = 23021311995 and 23021312013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021312033) 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, 368611 + ... + 426516.

Almost surely, 2^23021312031 is an apocalyptic number.

23021312031 is a deficient number, since it is larger than the sum of its proper divisors (10242072721).

23021312031 is a wasteful number, since it uses less digits than its factorization.

23021312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798350 (or 798347 counting only the distinct ones).

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

Adding to 23021312031 its reverse (13021312032), we get a palindrome (36042624063).

Subtracting from 23021312031 its reverse (13021312032), we obtain a palindrome (9999999999).

The spelling of 23021312031 in words is "twenty-three billion, twenty-one million, three hundred twelve thousand, thirty-one".