91122118 has 16 divisors (see below), whose sum is σ = 141924960. Its totient is φ = 43825600.

The previous prime is 91122107. The next prime is 91122127. The reversal of 91122118 is 81122119.

It is a junction number, because it is equal to n+sod(n) for n = 91122092 and 91122101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13503 + ... + 19093.

It is an arithmetic number, because the mean of its divisors is an integer number (8870310).

Almost surely, 2^91122118 is an apocalyptic number.

91122118 is a deficient number, since it is larger than the sum of its proper divisors (50802842).

91122118 is a wasteful number, since it uses less digits than its factorization.

91122118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903.

The product of its digits is 288, while the sum is 25.

The square root of 91122118 is about 9545.7905906216. The cubic root of 91122118 is about 449.9952559171.

Subtracting from 91122118 its reverse (81122119), we obtain a palindrome (9999999).

The spelling of 91122118 in words is "ninety-one million, one hundred twenty-two thousand, one hundred eighteen".