23913286121 has 4 divisors (see below), whose sum is σ = 24496537044. Its totient is φ = 23330035200.

The previous prime is 23913286091. The next prime is 23913286127. The reversal of 23913286121 is 12168231932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4404180496 + 19509105625 = 66364^2 + 139675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23913286121 is a prime.

It is a super-2 number, since 2×23913286121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23913286127) 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 in 3 ways as a sum of consecutive naturals, for example, 291625400 + ... + 291625481.

It is an arithmetic number, because the mean of its divisors is an integer number (6124134261).

Almost surely, 2^23913286121 is an apocalyptic number.

It is an amenable number.

23913286121 is a deficient number, since it is larger than the sum of its proper divisors (583250923).

23913286121 is an equidigital number, since it uses as much as digits as its factorization.

23913286121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583250922.

The product of its digits is 31104, while the sum is 38.

The spelling of 23913286121 in words is "twenty-three billion, nine hundred thirteen million, two hundred eighty-six thousand, one hundred twenty-one".