12111112001 has 16 divisors (see below), whose sum is σ = 13455082368. Its totient is φ = 10842796800.

The previous prime is 12111111997. The next prime is 12111112007. The reversal of 12111112001 is 10021111121.

It is a cyclic number.

It is not a de Polignac number, because 12111112001 - 2² = 12111111997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12111112007) 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, 14795 + ... + 156336.

It is an arithmetic number, because the mean of its divisors is an integer number (840942648).

Almost surely, 2^12111112001 is an apocalyptic number.

It is an amenable number.

12111112001 is a deficient number, since it is larger than the sum of its proper divisors (1343970367).

12111112001 is a wasteful number, since it uses less digits than its factorization.

12111112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171352.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12111112001 its reverse (10021111121), we get a palindrome (22132223122).

The spelling of 12111112001 in words is "twelve billion, one hundred eleven million, one hundred twelve thousand, one".