12021330312 has 64 divisors (see below), whose sum is σ = 33409656000. Its totient is φ = 4005061632.

The previous prime is 12021330301. The next prime is 12021330341. The reversal of 12021330312 is 21303312021.

12021330312 is a `hidden beast` number, since 1 + 2 + 0 + 21 + 330 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443239 + ... + 469577.

It is an arithmetic number, because the mean of its divisors is an integer number (522025875).

Almost surely, 2^12021330312 is an apocalyptic number.

12021330312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021330312 is an abundant number, since it is smaller than the sum of its proper divisors (21388325688).

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

12021330312 is a wasteful number, since it uses less digits than its factorization.

12021330312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28467 (or 28457 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12021330312 its reverse (21303312021), we get a palindrome (33324642333).

The spelling of 12021330312 in words is "twelve billion, twenty-one million, three hundred thirty thousand, three hundred twelve".