1091109110911 has 4 divisors (see below), whose sum is σ = 1098431991000. Its totient is φ = 1083786230824.

The previous prime is 1091109110891. The next prime is 1091109110933. The reversal of 1091109110911 is 1190119011901.

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

It is a cyclic number.

It is not a de Polignac number, because 1091109110911 - 2⁵ = 1091109110879 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 (1091109110411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3661439821 + ... + 3661440118.

It is an arithmetic number, because the mean of its divisors is an integer number (274607997750).

Almost surely, 2^{1091109110911} is an apocalyptic number.

1091109110911 is a deficient number, since it is larger than the sum of its proper divisors (7322880089).

1091109110911 is an equidigital number, since it uses as much as digits as its factorization.

1091109110911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7322880088.

The product of its (nonzero) digits is 729, while the sum is 34.

The spelling of 1091109110911 in words is "one trillion, ninety-one billion, one hundred nine million, one hundred ten thousand, nine hundred eleven".