12012000111 has 8 divisors (see below), whose sum is σ = 17795555760. Its totient is φ = 8008000056.

The previous prime is 12012000109. The next prime is 12012000149. The reversal of 12012000111 is 11100021021.

It is a happy number.

It is not a de Polignac number, because 12012000111 - 2¹ = 12012000109 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 12012000093 and 12012000102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012000101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222444420 + ... + 222444473.

It is an arithmetic number, because the mean of its divisors is an integer number (2224444470).

Almost surely, 2^12012000111 is an apocalyptic number.

12012000111 is a deficient number, since it is larger than the sum of its proper divisors (5783555649).

12012000111 is an equidigital number, since it uses as much as digits as its factorization.

12012000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444888902 (or 444888896 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12012000111 its reverse (11100021021), we get a palindrome (23112021132).

The spelling of 12012000111 in words is "twelve billion, twelve million, one hundred eleven", and thus it is an aban number.