91222100111 has 16 divisors (see below), whose sum is σ = 96841755360. Its totient is φ = 85775047680.

The previous prime is 91222100093. The next prime is 91222100117. The reversal of 91222100111 is 11100122219.

It is a cyclic number.

It is not a de Polignac number, because 91222100111 - 2¹⁴ = 91222083727 is a prime.

It is a super-2 number, since 2×91222100111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91222100117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601271 + ... + 737543.

It is an arithmetic number, because the mean of its divisors is an integer number (6052609710).

Almost surely, 2^91222100111 is an apocalyptic number.

91222100111 is a deficient number, since it is larger than the sum of its proper divisors (5619655249).

91222100111 is a wasteful number, since it uses less digits than its factorization.

91222100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136906.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 91222100111 in words is "ninety-one billion, two hundred twenty-two million, one hundred thousand, one hundred eleven".