31112120239 has 2 divisors, whose sum is σ = 31112120240. Its totient is φ = 31112120238.

The previous prime is 31112120203. The next prime is 31112120243. The reversal of 31112120239 is 93202121113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31112120239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31112120639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556060119 + 15556060120.

It is an arithmetic number, because the mean of its divisors is an integer number (15556060120).

Almost surely, 2^31112120239 is an apocalyptic number.

31112120239 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112120239 is an equidigital number, since it uses as much as digits as its factorization.

31112120239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 31112120239 in words is "thirty-one billion, one hundred twelve million, one hundred twenty thousand, two hundred thirty-nine".