111122091 has 8 divisors (see below), whose sum is σ = 164625360. Its totient is φ = 74081376.

The previous prime is 111122087. The next prime is 111122093. The reversal of 111122091 is 190221111.

It is a happy number.

It is not a de Polignac number, because 111122091 - 2² = 111122087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111122093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2057790 + ... + 2057843.

It is an arithmetic number, because the mean of its divisors is an integer number (20578170).

Almost surely, 2^111122091 is an apocalyptic number.

111122091 is a deficient number, since it is larger than the sum of its proper divisors (53503269).

111122091 is an equidigital number, since it uses as much as digits as its factorization.

111122091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4115642 (or 4115636 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 111122091 is about 10541.4463428886. The cubic root of 111122091 is about 480.7656919876.

It can be divided in two parts, 11112 and 2091, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 111122091 in words is "one hundred eleven million, one hundred twenty-two thousand, ninety-one".