12012312 has 32 divisors (see below), whose sum is σ = 32341680. Its totient is φ = 3696000.

The previous prime is 12012289. The next prime is 12012331. The reversal of 12012312 is 21321021.

12012312 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 18939 + ... + 19562.

Almost surely, 2^12012312 is an apocalyptic number.

12012312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12012312 is an abundant number, since it is smaller than the sum of its proper divisors (20329368).

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

12012312 is a wasteful number, since it uses less digits than its factorization.

12012312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38523 (or 38519 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12012312 is about 3465.8782436779. The cubic root of 12012312 is about 229.0211202020.

Adding to 12012312 its reverse (21321021), we get a palindrome (33333333).

The spelling of 12012312 in words is "twelve million, twelve thousand, three hundred twelve".