31013213120933 has 2 divisors, whose sum is σ = 31013213120934. Its totient is φ = 31013213120932.

The previous prime is 31013213120927. The next prime is 31013213120947. The reversal of 31013213120933 is 33902131231013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22943170749409 + 8070042371524 = 4789903^2 + 2840782^2 .

It is a cyclic number.

It is not a de Polignac number, because 31013213120933 - 2²⁰ = 31013212072357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31013213120933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31013213126933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506606560466 + 15506606560467.

It is an arithmetic number, because the mean of its divisors is an integer number (15506606560467).

Almost surely, 2^{31013213120933} is an apocalyptic number.

It is an amenable number.

31013213120933 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013213120933 is an equidigital number, since it uses as much as digits as its factorization.

31013213120933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 32.

Adding to 31013213120933 its reverse (33902131231013), we get a palindrome (64915344351946).

The spelling of 31013213120933 in words is "thirty-one trillion, thirteen billion, two hundred thirteen million, one hundred twenty thousand, nine hundred thirty-three".