100111101091 has 4 divisors (see below), whose sum is σ = 100113167752. Its totient is φ = 100109034432.

The previous prime is 100111101073. The next prime is 100111101107. The reversal of 100111101091 is 190101111001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190101111001 = 1721 ⋅110459681.

It is a cyclic number.

It is not a de Polignac number, because 100111101091 - 2⁵ = 100111101059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100111101001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958881 + ... + 1058146.

It is an arithmetic number, because the mean of its divisors is an integer number (25028291938).

Almost surely, 2^100111101091 is an apocalyptic number.

100111101091 is a deficient number, since it is larger than the sum of its proper divisors (2066661).

100111101091 is an equidigital number, since it uses as much as digits as its factorization.

100111101091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066660.

The product of its (nonzero) digits is 9, while the sum is 16.

Adding to 100111101091 its reverse (190101111001), we get a palindrome (290212212092).

The spelling of 100111101091 in words is "one hundred billion, one hundred eleven million, one hundred one thousand, ninety-one".