311313112402051 has 2 divisors, whose sum is σ = 311313112402052. Its totient is φ = 311313112402050.

The previous prime is 311313112402021. The next prime is 311313112402057. The reversal of 311313112402051 is 150204211313113.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (150204211313113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311313112402051 - 2²¹ = 311313110304899 is a prime.

It is not a weakly prime, because it can be changed into another prime (311313112402057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155656556201025 + 155656556201026.

It is an arithmetic number, because the mean of its divisors is an integer number (155656556201026).

Almost surely, 2^{311313112402051} is an apocalyptic number.

311313112402051 is a deficient number, since it is larger than the sum of its proper divisors (1).

311313112402051 is an equidigital number, since it uses as much as digits as its factorization.

311313112402051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 311313112402051 its reverse (150204211313113), we get a palindrome (461517323715164).

The spelling of 311313112402051 in words is "three hundred eleven trillion, three hundred thirteen billion, one hundred twelve million, four hundred two thousand, fifty-one".