91121112066 has 32 divisors (see below), whose sum is σ = 185132683008. Its totient is φ = 29892796560.

The previous prime is 91121112059. The next prime is 91121112067. The reversal of 91121112066 is 66021112119.

It is not an unprimeable number, because it can be changed into a prime (91121112067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334701 + ... + 542463.

It is an arithmetic number, because the mean of its divisors is an integer number (5785396344).

Almost surely, 2^91121112066 is an apocalyptic number.

91121112066 is an abundant number, since it is smaller than the sum of its proper divisors (94011570942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91121112066 is a wasteful number, since it uses less digits than its factorization.

91121112066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208926.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 91121112066 in words is "ninety-one billion, one hundred twenty-one million, one hundred twelve thousand, sixty-six".