91200021221112 has 32 divisors (see below), whose sum is σ = 228380687568000. Its totient is φ = 30349255805024.

The previous prime is 91200021221093. The next prime is 91200021221171. The reversal of 91200021221112 is 21112212000219.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 3171939618 + ... + 3171968369.

It is an arithmetic number, because the mean of its divisors is an integer number (7136896486500).

Almost surely, 2^{91200021221112} is an apocalyptic number.

It is an amenable number.

91200021221112 is an abundant number, since it is smaller than the sum of its proper divisors (137180666346888).

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

91200021221112 is a wasteful number, since it uses less digits than its factorization.

91200021221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6343908595 (or 6343908591 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 91200021221112 in words is "ninety-one trillion, two hundred billion, twenty-one million, two hundred twenty-one thousand, one hundred twelve".