31113000031291 has 2 divisors, whose sum is σ = 31113000031292. Its totient is φ = 31113000031290.

The previous prime is 31113000031277. The next prime is 31113000031339. The reversal of 31113000031291 is 19213000031113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31113000031291 - 2⁷ = 31113000031163 is a prime.

It is a super-2 number, since 2×31113000031291² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31113000031591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556500015645 + 15556500015646.

It is an arithmetic number, because the mean of its divisors is an integer number (15556500015646).

Almost surely, 2^{31113000031291} is an apocalyptic number.

31113000031291 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113000031291 is an equidigital number, since it uses as much as digits as its factorization.

31113000031291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The spelling of 31113000031291 in words is "thirty-one trillion, one hundred thirteen billion, thirty-one thousand, two hundred ninety-one".