91131021002 has 8 divisors (see below), whose sum is σ = 156224607456. Its totient is φ = 39056151852.

The previous prime is 91131020963. The next prime is 91131021011. The reversal of 91131021002 is 20012013119.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3254679308 + ... + 3254679335.

It is an arithmetic number, because the mean of its divisors is an integer number (19528075932).

Almost surely, 2^91131021002 is an apocalyptic number.

91131021002 is a deficient number, since it is larger than the sum of its proper divisors (65093586454).

91131021002 is a wasteful number, since it uses less digits than its factorization.

91131021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509358652.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 91131021002 in words is "ninety-one billion, one hundred thirty-one million, twenty-one thousand, two".