11018191920191 has 8 divisors (see below), whose sum is σ = 11498250516480. Its totient is φ = 10538217221752.

The previous prime is 11018191920173. The next prime is 11018191920199. The reversal of 11018191920191 is 19102919181011.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11018191920191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11018191920199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20706011 + ... + 21231468.

It is an arithmetic number, because the mean of its divisors is an integer number (1437281314560).

Almost surely, 2^{11018191920191} is an apocalyptic number.

11018191920191 is a deficient number, since it is larger than the sum of its proper divisors (480058596289).

11018191920191 is a wasteful number, since it uses less digits than its factorization.

11018191920191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41948925.

The product of its (nonzero) digits is 11664, while the sum is 44.

The spelling of 11018191920191 in words is "eleven trillion, eighteen billion, one hundred ninety-one million, nine hundred twenty thousand, one hundred ninety-one".