311402054021 has 2 divisors, whose sum is σ = 311402054022. Its totient is φ = 311402054020.

The previous prime is 311402053993. The next prime is 311402054053. The reversal of 311402054021 is 120450204113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174524253121 + 136877800900 = 417761^2 + 369970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311402054021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311402050021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155701027010 + 155701027011.

It is an arithmetic number, because the mean of its divisors is an integer number (155701027011).

Almost surely, 2^311402054021 is an apocalyptic number.

It is an amenable number.

311402054021 is a deficient number, since it is larger than the sum of its proper divisors (1).

311402054021 is an equidigital number, since it uses as much as digits as its factorization.

311402054021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 311402054021 its reverse (120450204113), we get a palindrome (431852258134).

The spelling of 311402054021 in words is "three hundred eleven billion, four hundred two million, fifty-four thousand, twenty-one".