11011101091 has 4 divisors (see below), whose sum is σ = 11022213184. Its totient is φ = 10999989000.

The previous prime is 11011101083. The next prime is 11011101097. The reversal of 11011101091 is 19010111011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19010111011 = 8011 ⋅2373001.

It is a cyclic number.

It is not a de Polignac number, because 11011101091 - 2³ = 11011101083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011101097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5554560 + ... + 5556541.

It is an arithmetic number, because the mean of its divisors is an integer number (2755553296).

Almost surely, 2^11011101091 is an apocalyptic number.

11011101091 is a deficient number, since it is larger than the sum of its proper divisors (11112093).

11011101091 is an equidigital number, since it uses as much as digits as its factorization.

11011101091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11112092.

The product of its (nonzero) digits is 9, while the sum is 16.

The spelling of 11011101091 in words is "eleven billion, eleven million, one hundred one thousand, ninety-one".