31112213312993 has 2 divisors, whose sum is σ = 31112213312994. Its totient is φ = 31112213312992.

The previous prime is 31112213312969. The next prime is 31112213313023. The reversal of 31112213312993 is 39921331221113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22659285071329 + 8452928241664 = 4760177^2 + 2907392^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112213312993 - 2¹⁰ = 31112213311969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31112213312993.

It is not a weakly prime, because it can be changed into another prime (31112213312903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556106656496 + 15556106656497.

It is an arithmetic number, because the mean of its divisors is an integer number (15556106656497).

Almost surely, 2^{31112213312993} is an apocalyptic number.

It is an amenable number.

31112213312993 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112213312993 is an equidigital number, since it uses as much as digits as its factorization.

31112213312993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The spelling of 31112213312993 in words is "thirty-one trillion, one hundred twelve billion, two hundred thirteen million, three hundred twelve thousand, nine hundred ninety-three".