31200999004961 has 2 divisors, whose sum is σ = 31200999004962. Its totient is φ = 31200999004960.

The previous prime is 31200999004951. The next prime is 31200999004991. The reversal of 31200999004961 is 16940099900213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30134818851361 + 1066180153600 = 5489519^2 + 1032560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31200999004961 is a prime.

It is a super-2 number, since 2×31200999004961² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31200999004951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600499502480 + 15600499502481.

It is an arithmetic number, because the mean of its divisors is an integer number (15600499502481).

Almost surely, 2^{31200999004961} is an apocalyptic number.

It is an amenable number.

31200999004961 is a deficient number, since it is larger than the sum of its proper divisors (1).

31200999004961 is an equidigital number, since it uses as much as digits as its factorization.

31200999004961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 53.

The spelling of 31200999004961 in words is "thirty-one trillion, two hundred billion, nine hundred ninety-nine million, four thousand, nine hundred sixty-one".