11100111091 has 2 divisors, whose sum is σ = 11100111092. Its totient is φ = 11100111090.

The previous prime is 11100111047. The next prime is 11100111101. The reversal of 11100111091 is 19011100111.

11100111091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11100111091 - 2⁹ = 11100110579 is a prime.

It is not a weakly prime, because it can be changed into another prime (11100111041) 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 as a sum of consecutive naturals, namely, 5550055545 + 5550055546.

It is an arithmetic number, because the mean of its divisors is an integer number (5550055546).

Almost surely, 2^11100111091 is an apocalyptic number.

11100111091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100111091 is an equidigital number, since it uses as much as digits as its factorization.

11100111091 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 11100111091 in words is "eleven billion, one hundred million, one hundred eleven thousand, ninety-one".