91201020221002 has 16 divisors (see below), whose sum is σ = 139383387142272. Its totient is φ = 44739899764560.

The previous prime is 91201020220969. The next prime is 91201020221033. The reversal of 91201020221002 is 20012202010219.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20284483 + ... + 24369289.

It is an arithmetic number, because the mean of its divisors is an integer number (8711461696392).

Almost surely, 2^{91201020221002} is an apocalyptic number.

91201020221002 is a deficient number, since it is larger than the sum of its proper divisors (48182366921270).

91201020221002 is a wasteful number, since it uses less digits than its factorization.

91201020221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295493.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 91201020221002 in words is "ninety-one trillion, two hundred one billion, twenty million, two hundred twenty-one thousand, two".