31201222320139 has 2 divisors, whose sum is σ = 31201222320140. Its totient is φ = 31201222320138.

The previous prime is 31201222320113. The next prime is 31201222320187. The reversal of 31201222320139 is 93102322210213.

It is a weak prime.

It is an emirp because it is prime and its reverse (93102322210213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31201222320139 - 2⁹ = 31201222319627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31201222320139.

It is not a weakly prime, because it can be changed into another prime (31201222320239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600611160069 + 15600611160070.

It is an arithmetic number, because the mean of its divisors is an integer number (15600611160070).

Almost surely, 2^{31201222320139} is an apocalyptic number.

31201222320139 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201222320139 is an equidigital number, since it uses as much as digits as its factorization.

31201222320139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 31201222320139 in words is "thirty-one trillion, two hundred one billion, two hundred twenty-two million, three hundred twenty thousand, one hundred thirty-nine".