31112422091 has 2 divisors, whose sum is σ = 31112422092. Its totient is φ = 31112422090.

The previous prime is 31112422087. The next prime is 31112422111. The reversal of 31112422091 is 19022421113.

It is a weak prime.

It is an emirp because it is prime and its reverse (19022421113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31112422091 - 2² = 31112422087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31112422091.

It is not a weakly prime, because it can be changed into another prime (31112412091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556211045 + 15556211046.

It is an arithmetic number, because the mean of its divisors is an integer number (15556211046).

Almost surely, 2^31112422091 is an apocalyptic number.

31112422091 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112422091 is an equidigital number, since it uses as much as digits as its factorization.

31112422091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 31112422091 in words is "thirty-one billion, one hundred twelve million, four hundred twenty-two thousand, ninety-one".