313012213021 has 2 divisors, whose sum is σ = 313012213022. Its totient is φ = 313012213020.

The previous prime is 313012213009. The next prime is 313012213039. The reversal of 313012213021 is 120312210313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312996610521 + 15602500 = 559461^2 + 3950^2 .

It is an emirp because it is prime and its reverse (120312210313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313012213021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313012213021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313012213121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156506106510 + 156506106511.

It is an arithmetic number, because the mean of its divisors is an integer number (156506106511).

Almost surely, 2^313012213021 is an apocalyptic number.

It is an amenable number.

313012213021 is a deficient number, since it is larger than the sum of its proper divisors (1).

313012213021 is an equidigital number, since it uses as much as digits as its factorization.

313012213021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 313012213021 its reverse (120312210313), we get a palindrome (433324423334).

The spelling of 313012213021 in words is "three hundred thirteen billion, twelve million, two hundred thirteen thousand, twenty-one".