91102120311111 has 64 divisors (see below), whose sum is σ = 156155575511040. Its totient is φ = 45919009382400.

The previous prime is 91102120311107. The next prime is 91102120311173. The reversal of 91102120311111 is 11111302120119.

It is not a de Polignac number, because 91102120311111 - 2² = 91102120311107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91102120311011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 854290 + ... + 13525311.

It is an arithmetic number, because the mean of its divisors is an integer number (2439930867360).

Almost surely, 2^{91102120311111} is an apocalyptic number.

91102120311111 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

91102120311111 is a deficient number, since it is larger than the sum of its proper divisors (65053455199929).

91102120311111 is a wasteful number, since it uses less digits than its factorization.

91102120311111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14380656.

The product of its (nonzero) digits is 108, while the sum is 24.

The spelling of 91102120311111 in words is "ninety-one trillion, one hundred two billion, one hundred twenty million, three hundred eleven thousand, one hundred eleven".