110100100091 has 2 divisors, whose sum is σ = 110100100092. Its totient is φ = 110100100090.

The previous prime is 110100100081. The next prime is 110100100139. The reversal of 110100100091 is 190001001011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 110100100091 - 2¹⁴ = 110100083707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (110100100021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55050050045 + 55050050046.

It is an arithmetic number, because the mean of its divisors is an integer number (55050050046).

Almost surely, 2^110100100091 is an apocalyptic number.

110100100091 is a deficient number, since it is larger than the sum of its proper divisors (1).

110100100091 is an equidigital number, since it uses as much as digits as its factorization.

110100100091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 14.

The spelling of 110100100091 in words is "one hundred ten billion, one hundred million, one hundred thousand, ninety-one".