113031999991 has 2 divisors, whose sum is σ = 113031999992. Its totient is φ = 113031999990.

The previous prime is 113031999979. The next prime is 113032000031. The reversal of 113031999991 is 199999130311.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113031999991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113031999961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56515999995 + 56515999996.

It is an arithmetic number, because the mean of its divisors is an integer number (56515999996).

Almost surely, 2^113031999991 is an apocalyptic number.

113031999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

113031999991 is an equidigital number, since it uses as much as digits as its factorization.

113031999991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 531441, while the sum is 55.

The spelling of 113031999991 in words is "one hundred thirteen billion, thirty-one million, nine hundred ninety-nine thousand, nine hundred ninety-one".