23120512021 has 2 divisors, whose sum is σ = 23120512022. Its totient is φ = 23120512020.

The previous prime is 23120511983. The next prime is 23120512027. The reversal of 23120512021 is 12021502132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14468721796 + 8651790225 = 120286^2 + 93015^2 .

It is a cyclic number.

It is not a de Polignac number, because 23120512021 - 2⁹ = 23120511509 is a prime.

It is a super-2 number, since 2×23120512021² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23120512021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23120512027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560256010 + 11560256011.

It is an arithmetic number, because the mean of its divisors is an integer number (11560256011).

Almost surely, 2^23120512021 is an apocalyptic number.

It is an amenable number.

23120512021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23120512021 is an equidigital number, since it uses as much as digits as its factorization.

23120512021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The spelling of 23120512021 in words is "twenty-three billion, one hundred twenty million, five hundred twelve thousand, twenty-one".