91110000012 has 24 divisors (see below), whose sum is σ = 216601133616. Its totient is φ = 29796980928.

The previous prime is 91110000001. The next prime is 91110000017. The reversal of 91110000012 is 21000001119.

It is a junction number, because it is equal to n+sod(n) for n = 91109999946 and 91110000000.

It is not an unprimeable number, because it can be changed into a prime (91110000017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71626723 + ... + 71627994.

It is an arithmetic number, because the mean of its divisors is an integer number (9025047234).

Almost surely, 2^91110000012 is an apocalyptic number.

It is an amenable number.

91110000012 is an abundant number, since it is smaller than the sum of its proper divisors (125491133604).

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

91110000012 is a wasteful number, since it uses less digits than its factorization.

91110000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143254777 (or 143254775 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 15.

The spelling of 91110000012 in words is "ninety-one billion, one hundred ten million, twelve", and thus it is an aban number.