12000111111 has 12 divisors (see below), whose sum is σ = 17702292192. Its totient is φ = 7829859456.

The previous prime is 12000111091. The next prime is 12000111119. The reversal of 12000111111 is 11111100021.

It is not a de Polignac number, because 12000111111 - 2⁶ = 12000111047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

12000111111 is a modest number, since divided by 111111 gives 12000 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12000111093 and 12000111102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000111119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14184106 + ... + 14184951.

It is an arithmetic number, because the mean of its divisors is an integer number (1475191016).

Almost surely, 2^12000111111 is an apocalyptic number.

12000111111 is a deficient number, since it is larger than the sum of its proper divisors (5702181081).

12000111111 is a wasteful number, since it uses less digits than its factorization.

12000111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28369110 (or 28369107 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 12000111111 its reverse (11111100021), we get a palindrome (23111211132).

The spelling of 12000111111 in words is "twelve billion, one hundred eleven thousand, one hundred eleven".