111120091 has 2 divisors, whose sum is σ = 111120092. Its totient is φ = 111120090.

The previous prime is 111120073. The next prime is 111120133. The reversal of 111120091 is 190021111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111120091 - 2⁵ = 111120059 is a prime.

It is not a weakly prime, because it can be changed into another prime (111120071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560045 + 55560046.

It is an arithmetic number, because the mean of its divisors is an integer number (55560046).

Almost surely, 2^111120091 is an apocalyptic number.

111120091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120091 is an equidigital number, since it uses as much as digits as its factorization.

111120091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 111120091 is about 10541.3514788190. The cubic root of 111120091 is about 480.7628076611.

The spelling of 111120091 in words is "one hundred eleven million, one hundred twenty thousand, ninety-one".