313121021959 has 2 divisors, whose sum is σ = 313121021960. Its totient is φ = 313121021958.

The previous prime is 313121021947. The next prime is 313121021987. The reversal of 313121021959 is 959120121313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 313121021959 - 2⁷ = 313121021831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313121021989) 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, 156560510979 + 156560510980.

It is an arithmetic number, because the mean of its divisors is an integer number (156560510980).

Almost surely, 2^313121021959 is an apocalyptic number.

313121021959 is a deficient number, since it is larger than the sum of its proper divisors (1).

313121021959 is an equidigital number, since it uses as much as digits as its factorization.

313121021959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 37.

The spelling of 313121021959 in words is "three hundred thirteen billion, one hundred twenty-one million, twenty-one thousand, nine hundred fifty-nine".