12001200111 has 16 divisors (see below), whose sum is σ = 18193035520. Its totient is φ = 7814734200.

The previous prime is 12001200059. The next prime is 12001200131. The reversal of 12001200111 is 11100210021.

It is a happy number.

It is not a de Polignac number, because 12001200111 - 2⁶ = 12001200047 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001200093 and 12001200102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001200131) 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, 5167315 + ... + 5169636.

It is an arithmetic number, because the mean of its divisors is an integer number (1137064720).

Almost surely, 2^12001200111 is an apocalyptic number.

12001200111 is a deficient number, since it is larger than the sum of its proper divisors (6191835409).

12001200111 is a wasteful number, since it uses less digits than its factorization.

12001200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10337003 (or 10336997 counting only the distinct ones).

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

Adding to 12001200111 its reverse (11100210021), we get a palindrome (23101410132).

The spelling of 12001200111 in words is "twelve billion, one million, two hundred thousand, one hundred eleven".