31212113200157 has 2 divisors, whose sum is σ = 31212113200158. Its totient is φ = 31212113200156.

The previous prime is 31212113200139. The next prime is 31212113200193. The reversal of 31212113200157 is 75100231121213.

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., 26332281987001 + 4879831213156 = 5131499^2 + 2209034^2 .

It is a cyclic number.

It is not a de Polignac number, because 31212113200157 - 2⁸ = 31212113199901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31212113205157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606056600078 + 15606056600079.

It is an arithmetic number, because the mean of its divisors is an integer number (15606056600079).

Almost surely, 2^{31212113200157} is an apocalyptic number.

It is an amenable number.

31212113200157 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212113200157 is an equidigital number, since it uses as much as digits as its factorization.

31212113200157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The spelling of 31212113200157 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirteen million, two hundred thousand, one hundred fifty-seven".