12156000222 has 16 divisors (see below), whose sum is σ = 24604917120. Its totient is φ = 4003180632.

The previous prime is 12156000217. The next prime is 12156000257. The reversal of 12156000222 is 22200065121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12204322 + ... + 12205317.

It is an arithmetic number, because the mean of its divisors is an integer number (1537807320).

Almost surely, 2^12156000222 is an apocalyptic number.

12156000222 is an abundant number, since it is smaller than the sum of its proper divisors (12448916898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12156000222 is a wasteful number, since it uses less digits than its factorization.

12156000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24409727.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12156000222 its reverse (22200065121), we get a palindrome (34356065343).

The spelling of 12156000222 in words is "twelve billion, one hundred fifty-six million, two hundred twenty-two", and thus it is an aban number.