23321021231 has 2 divisors, whose sum is σ = 23321021232. Its totient is φ = 23321021230.

The previous prime is 23321021221. The next prime is 23321021267. The reversal of 23321021231 is 13212012332.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23321021231 - 2³⁰ = 22247279407 is a prime.

It is a super-2 number, since 2×23321021231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23321021221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11660510615 + 11660510616.

It is an arithmetic number, because the mean of its divisors is an integer number (11660510616).

Almost surely, 2^23321021231 is an apocalyptic number.

23321021231 is a deficient number, since it is larger than the sum of its proper divisors (1).

23321021231 is an equidigital number, since it uses as much as digits as its factorization.

23321021231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23321021231 its reverse (13212012332), we get a palindrome (36533033563).

The spelling of 23321021231 in words is "twenty-three billion, three hundred twenty-one million, twenty-one thousand, two hundred thirty-one".