5107112001991 has 2 divisors, whose sum is σ = 5107112001992. Its totient is φ = 5107112001990.

The previous prime is 5107112001989. The next prime is 5107112002009. The reversal of 5107112001991 is 1991002117015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5107112001991 - 2¹ = 5107112001989 is a prime.

Together with 5107112001989, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 5107112001991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5107112001961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2553556000995 + 2553556000996.

It is an arithmetic number, because the mean of its divisors is an integer number (2553556000996).

Almost surely, 2^{5107112001991} is an apocalyptic number.

5107112001991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5107112001991 is an equidigital number, since it uses as much as digits as its factorization.

5107112001991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 37.

The spelling of 5107112001991 in words is "five trillion, one hundred seven billion, one hundred twelve million, one thousand, nine hundred ninety-one".