31112110987 has 2 divisors, whose sum is σ = 31112110988. Its totient is φ = 31112110986.

The previous prime is 31112110969. The next prime is 31112111011. The reversal of 31112110987 is 78901121113.

It is a weak prime.

It is an emirp because it is prime and its reverse (78901121113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31112110987 - 2⁷ = 31112110859 is a prime.

It is a super-2 number, since 2×31112110987² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31112110927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556055493 + 15556055494.

It is an arithmetic number, because the mean of its divisors is an integer number (15556055494).

Almost surely, 2^31112110987 is an apocalyptic number.

31112110987 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112110987 is an equidigital number, since it uses as much as digits as its factorization.

31112110987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 34.

The spelling of 31112110987 in words is "thirty-one billion, one hundred twelve million, one hundred ten thousand, nine hundred eighty-seven".