91110012 has 72 divisors (see below), whose sum is σ = 250220880. Its totient is φ = 25724160.

The previous prime is 91110001. The next prime is 91110029. The reversal of 91110012 is 21001119.

It is a junction number, because it is equal to n+sod(n) for n = 91109973 and 91110000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51462 + ... + 53202.

It is an arithmetic number, because the mean of its divisors is an integer number (3475290).

Almost surely, 2^91110012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91110012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125110440).

91110012 is an abundant number, since it is smaller than the sum of its proper divisors (159110868).

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

91110012 is a wasteful number, since it uses less digits than its factorization.

91110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851 (or 1842 counting only the distinct ones).

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

The square root of 91110012 is about 9545.1564680732. The cubic root of 91110012 is about 449.9753270423.

The spelling of 91110012 in words is "ninety-one million, one hundred ten thousand, twelve".