11111011111009 has 8 divisors (see below), whose sum is σ = 11186091036000. Its totient is φ = 11036075711232.

The previous prime is 11111011110937. The next prime is 11111011111043. The reversal of 11111011111009 is 90011111011111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11111011111009 - 2²⁵ = 11110977556577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111011112009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35977024 + ... + 36284545.

It is an arithmetic number, because the mean of its divisors is an integer number (1398261379500).

Almost surely, 2^{11111011111009} is an apocalyptic number.

It is an amenable number.

11111011111009 is a deficient number, since it is larger than the sum of its proper divisors (75079924991).

11111011111009 is an equidigital number, since it uses as much as digits as its factorization.

11111011111009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72262607.

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

The spelling of 11111011111009 in words is "eleven trillion, one hundred eleven billion, eleven million, one hundred eleven thousand, nine".