12111222111112 has 16 divisors (see below), whose sum is σ = 22760986133340. Its totient is φ = 6041625808896.

The previous prime is 12111222111103. The next prime is 12111222111193. The reversal of 12111222111112 is 21111122211121.

It can be written as a sum of positive squares in 2 ways, for example, as 8996964256036 + 3114257855076 = 2999494^2 + 1764726^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12111222111112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748152153 + ... + 1748159080.

Almost surely, 2^{12111222111112} is an apocalyptic number.

It is an amenable number.

12111222111112 is a deficient number, since it is larger than the sum of its proper divisors (10649764022228).

12111222111112 is a wasteful number, since it uses less digits than its factorization.

12111222111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3496311672 (or 3496311668 counting only the distinct ones).

The product of its digits is 32, while the sum is 19.

Adding to 12111222111112 its reverse (21111122211121), we get a palindrome (33222344322233).

The spelling of 12111222111112 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-two million, one hundred eleven thousand, one hundred twelve".