91011203102 has 16 divisors (see below), whose sum is σ = 140226621120. Its totient is φ = 44269350048.

The previous prime is 91011203069. The next prime is 91011203117. The reversal of 91011203102 is 20130211019.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451424 + ... + 621132.

It is an arithmetic number, because the mean of its divisors is an integer number (8764163820).

Almost surely, 2^91011203102 is an apocalyptic number.

91011203102 is a deficient number, since it is larger than the sum of its proper divisors (49215418018).

91011203102 is a wasteful number, since it uses less digits than its factorization.

91011203102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176995.

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

The spelling of 91011203102 in words is "ninety-one billion, eleven million, two hundred three thousand, one hundred two".