111213091 has 8 divisors (see below), whose sum is σ = 122986224. Its totient is φ = 99717120.

The previous prime is 111213079. The next prime is 111213101. The reversal of 111213091 is 190312111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111213091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111213041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68446 + ... + 70051.

It is an arithmetic number, because the mean of its divisors is an integer number (15373278).

Almost surely, 2^111213091 is an apocalyptic number.

111213091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111213091 is a deficient number, since it is larger than the sum of its proper divisors (11773133).

111213091 is a wasteful number, since it uses less digits than its factorization.

111213091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138581.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 111213091 is about 10545.7617553214. The cubic root of 111213091 is about 480.8968922453.

The spelling of 111213091 in words is "one hundred eleven million, two hundred thirteen thousand, ninety-one".