12111110009 has 16 divisors (see below), whose sum is σ = 12447969600. Its totient is φ = 11778975936.

The previous prime is 12111109897. The next prime is 12111110027. The reversal of 12111110009 is 90001111121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12111110009 - 2⁸ = 12111109753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111110059) 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, 7028222 + ... + 7029944.

It is an arithmetic number, because the mean of its divisors is an integer number (777998100).

Almost surely, 2^12111110009 is an apocalyptic number.

It is an amenable number.

12111110009 is a deficient number, since it is larger than the sum of its proper divisors (336859591).

12111110009 is a wasteful number, since it uses less digits than its factorization.

12111110009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984.

The product of its (nonzero) digits is 18, while the sum is 17.

The spelling of 12111110009 in words is "twelve billion, one hundred eleven million, one hundred ten thousand, nine".