12012320012 has 54 divisors (see below), whose sum is σ = 26878860036. Its totient is φ = 4680115440.

The previous prime is 12012319987. The next prime is 12012320077. The reversal of 12012320012 is 21002321021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 229538 + ... + 276969.

Almost surely, 2^12012320012 is an apocalyptic number.

It is an amenable number.

12012320012 is an abundant number, since it is smaller than the sum of its proper divisors (14866540024).

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

12012320012 is a wasteful number, since it uses less digits than its factorization.

12012320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506547 (or 506527 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12012320012 its reverse (21002321021), we get a palindrome (33014641033).

The spelling of 12012320012 in words is "twelve billion, twelve million, three hundred twenty thousand, twelve".