111090920191 has 2 divisors, whose sum is σ = 111090920192. Its totient is φ = 111090920190.

The previous prime is 111090920183. The next prime is 111090920209. The reversal of 111090920191 is 191029090111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111090920191 - 2³ = 111090920183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111090920111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55545460095 + 55545460096.

It is an arithmetic number, because the mean of its divisors is an integer number (55545460096).

Almost surely, 2^111090920191 is an apocalyptic number.

111090920191 is a deficient number, since it is larger than the sum of its proper divisors (1).

111090920191 is an equidigital number, since it uses as much as digits as its factorization.

111090920191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 111090920191 in words is "one hundred eleven billion, ninety million, nine hundred twenty thousand, one hundred ninety-one".