12321330021 has 96 divisors (see below), whose sum is σ = 24720433920. Its totient is φ = 5704473600.

The previous prime is 12321330011. The next prime is 12321330031. The reversal of 12321330021 is 12003312321.

12321330021 is a `hidden beast` number, since 12 + 321 + 330 + 0 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (12321330011) and next prime (12321330031).

It is not a de Polignac number, because 12321330021 - 2¹⁰ = 12321328997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12321329976 and 12321330003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321330001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 237681 + ... + 284841.

It is an arithmetic number, because the mean of its divisors is an integer number (257504520).

Almost surely, 2^12321330021 is an apocalyptic number.

12321330021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12321330021 is an abundant number, since it is smaller than the sum of its proper divisors (12399103899).

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

12321330021 is a wasteful number, since it uses less digits than its factorization.

12321330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47227 (or 47224 counting only the distinct ones).

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

Adding to 12321330021 its reverse (12003312321), we get a palindrome (24324642342).

The spelling of 12321330021 in words is "twelve billion, three hundred twenty-one million, three hundred thirty thousand, twenty-one".