23312320121 has 2 divisors, whose sum is σ = 23312320122. Its totient is φ = 23312320120.

The previous prime is 23312320111. The next prime is 23312320153. The reversal of 23312320121 is 12102321332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18180746896 + 5131573225 = 134836^2 + 71635^2 .

It is a cyclic number.

It is not a de Polignac number, because 23312320121 - 2²² = 23308125817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23312320093 and 23312320102.

It is not a weakly prime, because it can be changed into another prime (23312320111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11656160060 + 11656160061.

It is an arithmetic number, because the mean of its divisors is an integer number (11656160061).

Almost surely, 2^23312320121 is an apocalyptic number.

It is an amenable number.

23312320121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23312320121 is an equidigital number, since it uses as much as digits as its factorization.

23312320121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 23312320121 its reverse (12102321332), we get a palindrome (35414641453).

The spelling of 23312320121 in words is "twenty-three billion, three hundred twelve million, three hundred twenty thousand, one hundred twenty-one".