12321020312 has 8 divisors (see below), whose sum is σ = 23101913100. Its totient is φ = 6160510152.

The previous prime is 12321020297. The next prime is 12321020321. The reversal of 12321020312 is 21302012321.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770063762 + ... + 770063777.

Almost surely, 2^12321020312 is an apocalyptic number.

It is an amenable number.

12321020312 is a deficient number, since it is larger than the sum of its proper divisors (10780892788).

12321020312 is a wasteful number, since it uses less digits than its factorization.

12321020312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540127545 (or 1540127541 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12321020312 its reverse (21302012321), we get a palindrome (33623032633).

The spelling of 12321020312 in words is "twelve billion, three hundred twenty-one million, twenty thousand, three hundred twelve".