11011000009 has 4 divisors (see below), whose sum is σ = 11022112000. Its totient is φ = 10999888020.

The previous prime is 11011000003. The next prime is 11011000043. The reversal of 11011000009 is 90000011011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90000011011 = 23 ⋅3913043957.

It is a cyclic number.

It is not a de Polignac number, because 11011000009 - 2²⁷ = 10876782281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011000003) 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, 5554509 + ... + 5556490.

It is an arithmetic number, because the mean of its divisors is an integer number (2755528000).

Almost surely, 2^11011000009 is an apocalyptic number.

It is an amenable number.

11011000009 is a deficient number, since it is larger than the sum of its proper divisors (11111991).

11011000009 is an equidigital number, since it uses as much as digits as its factorization.

11011000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111990.

The product of its (nonzero) digits is 9, while the sum is 13.

The spelling of 11011000009 in words is "eleven billion, eleven million, nine", and thus it is an aban number and an uban number.