23031220123021 has 16 divisors (see below), whose sum is σ = 26531830463040. Its totient is φ = 19772128321920.

The previous prime is 23031220123013. The next prime is 23031220123027. The reversal of 23031220123021 is 12032102213032.

It is a cyclic number.

It is not a de Polignac number, because 23031220123021 - 2³ = 23031220123013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23031220122983 and 23031220123001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031220123027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175968490 + ... + 176099323.

It is an arithmetic number, because the mean of its divisors is an integer number (1658239403940).

Almost surely, 2^{23031220123021} is an apocalyptic number.

It is an amenable number.

23031220123021 is a deficient number, since it is larger than the sum of its proper divisors (3500610340019).

23031220123021 is a wasteful number, since it uses less digits than its factorization.

23031220123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352068156.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 23031220123021 its reverse (12032102213032), we get a palindrome (35063322336053).

The spelling of 23031220123021 in words is "twenty-three trillion, thirty-one billion, two hundred twenty million, one hundred twenty-three thousand, twenty-one".