112120010001991 has 2 divisors, whose sum is σ = 112120010001992. Its totient is φ = 112120010001990.

The previous prime is 112120010001929. The next prime is 112120010002061. The reversal of 112120010001991 is 199100010021211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 112120010001991 - 2²⁹ = 112119473131079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112120010004991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56060005000995 + 56060005000996.

It is an arithmetic number, because the mean of its divisors is an integer number (56060005000996).

Almost surely, 2^{112120010001991} is an apocalyptic number.

112120010001991 is a deficient number, since it is larger than the sum of its proper divisors (1).

112120010001991 is an equidigital number, since it uses as much as digits as its factorization.

112120010001991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 112120010001991 in words is "one hundred twelve trillion, one hundred twenty billion, ten million, one thousand, nine hundred ninety-one".