11009111111 has 4 divisors (see below), whose sum is σ = 11009486592. Its totient is φ = 11008735632.

The previous prime is 11009111101. The next prime is 11009111131. The reversal of 11009111111 is 11111190011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11111190011 = 2069 ⋅5370319.

It is a cyclic number.

It is not a de Polignac number, because 11009111111 - 2²² = 11004916807 is a prime.

It is a Duffinian number.

11009111111 is a modest number, since divided by 111111 gives 11009 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 11009111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11009111101) 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, 139655 + ... + 203768.

It is an arithmetic number, because the mean of its divisors is an integer number (2752371648).

Almost surely, 2^11009111111 is an apocalyptic number.

11009111111 is a deficient number, since it is larger than the sum of its proper divisors (375481).

11009111111 is an equidigital number, since it uses as much as digits as its factorization.

11009111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375480.

The product of its (nonzero) digits is 9, while the sum is 17.

The spelling of 11009111111 in words is "eleven billion, nine million, one hundred eleven thousand, one hundred eleven".