91320100211 has 4 divisors (see below), whose sum is σ = 91372554624. Its totient is φ = 91267645800.

The previous prime is 91320100199. The next prime is 91320100247. The reversal of 91320100211 is 11200102319.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91320100211 - 2⁶ = 91320100147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91320100411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26224595 + ... + 26228076.

It is an arithmetic number, because the mean of its divisors is an integer number (22843138656).

Almost surely, 2^91320100211 is an apocalyptic number.

91320100211 is a deficient number, since it is larger than the sum of its proper divisors (52454413).

91320100211 is a wasteful number, since it uses less digits than its factorization.

91320100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52454412.

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

The spelling of 91320100211 in words is "ninety-one billion, three hundred twenty million, one hundred thousand, two hundred eleven".