111002102191 has 24 divisors (see below), whose sum is σ = 120938744960. Its totient is φ = 101805524352.

The previous prime is 111002102177. The next prime is 111002102209. The reversal of 111002102191 is 191201200111.

It is a de Polignac number, because none of the positive numbers 2^k-111002102191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002102171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5445280 + ... + 5465626.

Almost surely, 2^111002102191 is an apocalyptic number.

111002102191 is a deficient number, since it is larger than the sum of its proper divisors (9936642769).

111002102191 is a wasteful number, since it uses less digits than its factorization.

111002102191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20863 (or 20846 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 111002102191 in words is "one hundred eleven billion, two million, one hundred two thousand, one hundred ninety-one".