23031012021 has 32 divisors (see below), whose sum is σ = 33281031168. Its totient is φ = 14113908480.

The previous prime is 23031012007. The next prime is 23031012047. The reversal of 23031012021 is 12021013032.

It is not a de Polignac number, because 23031012021 - 2¹⁸ = 23030749877 is a prime.

It is a super-2 number, since 2×23031012021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031012421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357726 + ... + 417168.

It is an arithmetic number, because the mean of its divisors is an integer number (1040032224).

Almost surely, 2^23031012021 is an apocalyptic number.

It is an amenable number.

23031012021 is a deficient number, since it is larger than the sum of its proper divisors (10250019147).

23031012021 is a wasteful number, since it uses less digits than its factorization.

23031012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59641.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 23031012021 its reverse (12021013032), we get a palindrome (35052025053).

The spelling of 23031012021 in words is "twenty-three billion, thirty-one million, twelve thousand, twenty-one".