12003012312 has 16 divisors (see below), whose sum is σ = 30007530840. Its totient is φ = 4001004096.

The previous prime is 12003012289. The next prime is 12003012319. The reversal of 12003012312 is 21321030021.

It is a junction number, because it is equal to n+sod(n) for n = 12003012291 and 12003012300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003012319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250062733 + ... + 250062780.

Almost surely, 2^12003012312 is an apocalyptic number.

12003012312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12003012312 is an abundant number, since it is smaller than the sum of its proper divisors (18004518528).

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

12003012312 is a wasteful number, since it uses less digits than its factorization.

12003012312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500125522 (or 500125518 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12003012312 its reverse (21321030021), we get a palindrome (33324042333).

The spelling of 12003012312 in words is "twelve billion, three million, twelve thousand, three hundred twelve".