23310311021 has 2 divisors, whose sum is σ = 23310311022. Its totient is φ = 23310311020.

The previous prime is 23310310973. The next prime is 23310311029. The reversal of 23310311021 is 12011301332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20416408996 + 2893902025 = 142886^2 + 53795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23310311021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23310311029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11655155510 + 11655155511.

It is an arithmetic number, because the mean of its divisors is an integer number (11655155511).

Almost surely, 2^23310311021 is an apocalyptic number.

It is an amenable number.

23310311021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23310311021 is an equidigital number, since it uses as much as digits as its factorization.

23310311021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 23310311021 its reverse (12011301332), we get a palindrome (35321612353).

The spelling of 23310311021 in words is "twenty-three billion, three hundred ten million, three hundred eleven thousand, twenty-one".