1109192020091 has 4 divisors (see below), whose sum is σ = 1115603534832. Its totient is φ = 1102780505352.

The previous prime is 1109192019997. The next prime is 1109192020093. The reversal of 1109192020091 is 1900202919011.

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 1109192020091 - 2³⁴ = 1092012150907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109192020093) 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, 3205757111 + ... + 3205757456.

It is an arithmetic number, because the mean of its divisors is an integer number (278900883708).

Almost surely, 2^{1109192020091} is an apocalyptic number.

1109192020091 is a deficient number, since it is larger than the sum of its proper divisors (6411514741).

1109192020091 is an equidigital number, since it uses as much as digits as its factorization.

1109192020091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6411514740.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 1109192020091 in words is "one trillion, one hundred nine billion, one hundred ninety-two million, twenty thousand, ninety-one".