11011111012091 has 2 divisors, whose sum is σ = 11011111012092. Its totient is φ = 11011111012090.

The previous prime is 11011111012079. The next prime is 11011111012183. The reversal of 11011111012091 is 19021011111011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11011111012091 - 2²⁶ = 11011043903227 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011111012021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505555506045 + 5505555506046.

It is an arithmetic number, because the mean of its divisors is an integer number (5505555506046).

Almost surely, 2^{11011111012091} is an apocalyptic number.

11011111012091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011111012091 is an equidigital number, since it uses as much as digits as its factorization.

11011111012091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 20.

The spelling of 11011111012091 in words is "eleven trillion, eleven billion, one hundred eleven million, twelve thousand, ninety-one".