31112000999 has 2 divisors, whose sum is σ = 31112001000. Its totient is φ = 31112000998.

The previous prime is 31112000957. The next prime is 31112001049. The reversal of 31112000999 is 99900021113.

It is a weak prime.

It is an emirp because it is prime and its reverse (99900021113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31112000999 - 2²⁰ = 31110952423 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31112060999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556000499 + 15556000500.

It is an arithmetic number, because the mean of its divisors is an integer number (15556000500).

Almost surely, 2^31112000999 is an apocalyptic number.

31112000999 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112000999 is an equidigital number, since it uses as much as digits as its factorization.

31112000999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The spelling of 31112000999 in words is "thirty-one billion, one hundred twelve million, nine hundred ninety-nine", and thus it is an aban number.