12516222112 has 24 divisors (see below), whose sum is σ = 24665558400. Its totient is φ = 6251953344.

The previous prime is 12516222107. The next prime is 12516222113. The reversal of 12516222112 is 21122261521.

It is not an unprimeable number, because it can be changed into a prime (12516222113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159312 + ... + 224527.

It is an arithmetic number, because the mean of its divisors is an integer number (1027731600).

Almost surely, 2^12516222112 is an apocalyptic number.

It is an amenable number.

12516222112 is a deficient number, since it is larger than the sum of its proper divisors (12149336288).

12516222112 is a wasteful number, since it uses less digits than its factorization.

12516222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384868 (or 384860 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

Adding to 12516222112 its reverse (21122261521), we get a palindrome (33638483633).

The spelling of 12516222112 in words is "twelve billion, five hundred sixteen million, two hundred twenty-two thousand, one hundred twelve".