31119684140161 has 2 divisors, whose sum is σ = 31119684140162. Its totient is φ = 31119684140160.

The previous prime is 31119684140147. The next prime is 31119684140177. The reversal of 31119684140161 is 16104148691113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30951764491761 + 167919648400 = 5563431^2 + 409780^2 .

It is a cyclic number.

It is not a de Polignac number, because 31119684140161 - 2²⁵ = 31119650585729 is a prime.

It is not a weakly prime, because it can be changed into another prime (31119684140261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15559842070080 + 15559842070081.

It is an arithmetic number, because the mean of its divisors is an integer number (15559842070081).

Almost surely, 2^{31119684140161} is an apocalyptic number.

It is an amenable number.

31119684140161 is a deficient number, since it is larger than the sum of its proper divisors (1).

31119684140161 is an equidigital number, since it uses as much as digits as its factorization.

31119684140161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 46.

The spelling of 31119684140161 in words is "thirty-one trillion, one hundred nineteen billion, six hundred eighty-four million, one hundred forty thousand, one hundred sixty-one".