91231120112 has 40 divisors (see below), whose sum is σ = 193018656432. Its totient is φ = 41427993600.

The previous prime is 91231120093. The next prime is 91231120133. The reversal of 91231120112 is 21102113219.

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, 74153 + ... + 433544.

Almost surely, 2^91231120112 is an apocalyptic number.

It is an amenable number.

91231120112 is an abundant number, since it is smaller than the sum of its proper divisors (101787536320).

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

91231120112 is a wasteful number, since it uses less digits than its factorization.

91231120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508737 (or 508731 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 91231120112 in words is "ninety-one billion, two hundred thirty-one million, one hundred twenty thousand, one hundred twelve".