12002011111 has 4 divisors (see below), whose sum is σ = 12032865000. Its totient is φ = 11971157224.

The previous prime is 12002011097. The next prime is 12002011157. The reversal of 12002011111 is 11111020021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12002011111 - 2⁷ = 12002010983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002011711) 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, 15426361 + ... + 15427138.

It is an arithmetic number, because the mean of its divisors is an integer number (3008216250).

Almost surely, 2^12002011111 is an apocalyptic number.

12002011111 is a deficient number, since it is larger than the sum of its proper divisors (30853889).

12002011111 is an equidigital number, since it uses as much as digits as its factorization.

12002011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30853888.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12002011111 its reverse (11111020021), we get a palindrome (23113031132).

It can be divided in two parts, 120020 and 11111, that added together give a palindrome (131131).

The spelling of 12002011111 in words is "twelve billion, two million, eleven thousand, one hundred eleven".