100221112091 has 4 divisors (see below), whose sum is σ = 102551835672. Its totient is φ = 97890388512.

The previous prime is 100221112073. The next prime is 100221112109. The reversal of 100221112091 is 190211122001.

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

It is an interprime number because it is at equal distance from previous prime (100221112073) and next prime (100221112109).

It is a cyclic number.

It is not a de Polignac number, because 100221112091 - 2²⁶ = 100154003227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100221112001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165361726 + ... + 1165361811.

It is an arithmetic number, because the mean of its divisors is an integer number (25637958918).

Almost surely, 2^100221112091 is an apocalyptic number.

100221112091 is a deficient number, since it is larger than the sum of its proper divisors (2330723581).

100221112091 is an equidigital number, since it uses as much as digits as its factorization.

100221112091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330723580.

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

Adding to 100221112091 its reverse (190211122001), we get a palindrome (290432234092).

The spelling of 100221112091 in words is "one hundred billion, two hundred twenty-one million, one hundred twelve thousand, ninety-one".