91100093021 has 8 divisors (see below), whose sum is σ = 104130010560. Its totient is φ = 78074080128.

The previous prime is 91100092973. The next prime is 91100093033. The reversal of 91100093021 is 12039000119.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91100093021 - 2³⁰ = 90026351197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91100093321) 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, 925991 + ... + 1019636.

It is an arithmetic number, because the mean of its divisors is an integer number (13016251320).

Almost surely, 2^91100093021 is an apocalyptic number.

It is an amenable number.

91100093021 is a deficient number, since it is larger than the sum of its proper divisors (13029917539).

91100093021 is a wasteful number, since it uses less digits than its factorization.

91100093021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952323.

The product of its (nonzero) digits is 486, while the sum is 26.

The spelling of 91100093021 in words is "ninety-one billion, one hundred million, ninety-three thousand, twenty-one".