311131021079 has 2 divisors, whose sum is σ = 311131021080. Its totient is φ = 311131021078.

The previous prime is 311131021067. The next prime is 311131021099. The reversal of 311131021079 is 970120131113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311131021079 - 2¹⁶ = 311130955543 is a prime.

It is a super-2 number, since 2×311131021079² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311131021099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155565510539 + 155565510540.

It is an arithmetic number, because the mean of its divisors is an integer number (155565510540).

Almost surely, 2^311131021079 is an apocalyptic number.

311131021079 is a deficient number, since it is larger than the sum of its proper divisors (1).

311131021079 is an equidigital number, since it uses as much as digits as its factorization.

311131021079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 29.

The spelling of 311131021079 in words is "three hundred eleven billion, one hundred thirty-one million, twenty-one thousand, seventy-nine".