11011111111009 has 4 divisors (see below), whose sum is σ = 11011152913200. Its totient is φ = 11011069308820.

The previous prime is 11011111110997. The next prime is 11011111111067. The reversal of 11011111111009 is 90011111111011.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 11011111111009 - 2⁵ = 11011111110977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011111111069) 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, 20503459 + ... + 21033640.

It is an arithmetic number, because the mean of its divisors is an integer number (2752788228300).

Almost surely, 2^{11011111111009} is an apocalyptic number.

It is an amenable number.

11011111111009 is a deficient number, since it is larger than the sum of its proper divisors (41802191).

11011111111009 is an equidigital number, since it uses as much as digits as its factorization.

11011111111009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41802190.

The product of its (nonzero) digits is 9, while the sum is 19.

The spelling of 11011111111009 in words is "eleven trillion, eleven billion, one hundred eleven million, one hundred eleven thousand, nine".