11011111110091 has 8 divisors (see below), whose sum is σ = 11595002350400. Its totient is φ = 10427655777480.

The previous prime is 11011111110089. The next prime is 11011111110113. The reversal of 11011111110091 is 19001111111011.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11011111110091 - 2¹ = 11011111110089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 7 ways as a sum of consecutive naturals, for example, 108925065 + ... + 109026106.

It is an arithmetic number, because the mean of its divisors is an integer number (1449375293800).

Almost surely, 2^{11011111110091} is an apocalyptic number.

11011111110091 is a deficient number, since it is larger than the sum of its proper divisors (583891240309).

11011111110091 is a wasteful number, since it uses less digits than its factorization.

11011111110091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217953849.

The product of its (nonzero) digits is 9, while the sum is 19.

The spelling of 11011111110091 in words is "eleven trillion, eleven billion, one hundred eleven million, one hundred ten thousand, ninety-one".