23012321031 has 96 divisors (see below), whose sum is σ = 42409156608. Its totient is φ = 11715010560.

The previous prime is 23012321023. The next prime is 23012321039. The reversal of 23012321031 is 13012321032.

It is an interprime number because it is at equal distance from previous prime (23012321023) and next prime (23012321039).

It is not a de Polignac number, because 23012321031 - 2³ = 23012321023 is a prime.

It is a super-2 number, since 2×23012321031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23012320995 and 23012321013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23012321039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2384586 + ... + 2394216.

It is an arithmetic number, because the mean of its divisors is an integer number (441762048).

Almost surely, 2^23012321031 is an apocalyptic number.

23012321031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23012321031 is a deficient number, since it is larger than the sum of its proper divisors (19396835577).

23012321031 is a wasteful number, since it uses less digits than its factorization.

23012321031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9781 (or 9778 counting only the distinct ones).

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

Adding to 23012321031 its reverse (13012321032), we get a palindrome (36024642063).

Subtracting from 23012321031 its reverse (13012321032), we obtain a palindrome (9999999999).

The spelling of 23012321031 in words is "twenty-three billion, twelve million, three hundred twenty-one thousand, thirty-one".