91001109102 has 64 divisors (see below), whose sum is σ = 194607152640. Its totient is φ = 28284681600.

The previous prime is 91001109097. The next prime is 91001109113. The reversal of 91001109102 is 20190110019.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4952452 + ... + 4970792.

It is an arithmetic number, because the mean of its divisors is an integer number (3040736760).

Almost surely, 2^91001109102 is an apocalyptic number.

91001109102 is an abundant number, since it is smaller than the sum of its proper divisors (103606043538).

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

91001109102 is a wasteful number, since it uses less digits than its factorization.

91001109102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19049.

The product of its (nonzero) digits is 162, while the sum is 24.

The spelling of 91001109102 in words is "ninety-one billion, one million, one hundred nine thousand, one hundred two".