111002100015991 has 2 divisors, whose sum is σ = 111002100015992. Its totient is φ = 111002100015990.

The previous prime is 111002100015959. The next prime is 111002100016109. The reversal of 111002100015991 is 199510001200111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111002100015991 - 2⁵ = 111002100015959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111002100015941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55501050007995 + 55501050007996.

It is an arithmetic number, because the mean of its divisors is an integer number (55501050007996).

Almost surely, 2^{111002100015991} is an apocalyptic number.

111002100015991 is a deficient number, since it is larger than the sum of its proper divisors (1).

111002100015991 is an equidigital number, since it uses as much as digits as its factorization.

111002100015991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 31.

The spelling of 111002100015991 in words is "one hundred eleven trillion, two billion, one hundred million, fifteen thousand, nine hundred ninety-one".