11111111011009 has 16 divisors (see below), whose sum is σ = 11583735851520. Its totient is φ = 10645635600000.

The previous prime is 11111111010997. The next prime is 11111111011037. The reversal of 11111111011009 is 90011011111111.

It is a happy number.

It is not a de Polignac number, because 11111111011009 - 2³⁹ = 10561355197121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111111015009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62810334 + ... + 62986984.

It is an arithmetic number, because the mean of its divisors is an integer number (723983490720).

Almost surely, 2^{11111111011009} is an apocalyptic number.

It is an amenable number.

11111111011009 is a deficient number, since it is larger than the sum of its proper divisors (472624840511).

11111111011009 is a wasteful number, since it uses less digits than its factorization.

11111111011009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196872.

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

The spelling of 11111111011009 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, eleven thousand, nine".