91120121022 has 32 divisors (see below), whose sum is σ = 208793988864. Its totient is φ = 25969392000.

The previous prime is 91120121011. The next prime is 91120121063. The reversal of 91120121022 is 22012102119.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 91120121022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2688304 + ... + 2721987.

It is an arithmetic number, because the mean of its divisors is an integer number (6524812152).

Almost surely, 2^91120121022 is an apocalyptic number.

91120121022 is an abundant number, since it is smaller than the sum of its proper divisors (117673867842).

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

91120121022 is a wasteful number, since it uses less digits than its factorization.

91120121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410704.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 91120121022 in words is "ninety-one billion, one hundred twenty million, one hundred twenty-one thousand, twenty-two".