11011111110191 has 4 divisors (see below), whose sum is σ = 11011247759352. Its totient is φ = 11010974461032.

The previous prime is 11011111110173. The next prime is 11011111110221. The reversal of 11011111110191 is 19101111111011.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011111110191 is a prime.

It is a super-3 number, since 3×11011111110191³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011111110491) 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 in 3 ways as a sum of consecutive naturals, for example, 68203640 + ... + 68364893.

It is an arithmetic number, because the mean of its divisors is an integer number (2752811939838).

Almost surely, 2^{11011111110191} is an apocalyptic number.

11011111110191 is a deficient number, since it is larger than the sum of its proper divisors (136649161).

11011111110191 is an equidigital number, since it uses as much as digits as its factorization.

11011111110191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136649160.

The product of its (nonzero) digits is 9, while the sum is 20.

The spelling of 11011111110191 in words is "eleven trillion, eleven billion, one hundred eleven million, one hundred ten thousand, one hundred ninety-one".