11100191011091 has 48 divisors (see below), whose sum is σ = 14416083549504. Its totient is φ = 8319723729408.

The previous prime is 11100191011027. The next prime is 11100191011097. The reversal of 11100191011091 is 19011019100111.

It is not a de Polignac number, because 11100191011091 - 2⁶ = 11100191011027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11100191011091.

It is not an unprimeable number, because it can be changed into a prime (11100191011097) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2687825 + ... + 5424461.

It is an arithmetic number, because the mean of its divisors is an integer number (300335073948).

Almost surely, 2^{11100191011091} is an apocalyptic number.

11100191011091 is a deficient number, since it is larger than the sum of its proper divisors (3315892538413).

11100191011091 is a wasteful number, since it uses less digits than its factorization.

11100191011091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736768 (or 2736739 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 26.

The spelling of 11100191011091 in words is "eleven trillion, one hundred billion, one hundred ninety-one million, eleven thousand, ninety-one".