12020000321 has 12 divisors (see below), whose sum is σ = 14219443440. Its totient is φ = 10128230280.

The previous prime is 12020000281. The next prime is 12020000329. The reversal of 12020000321 is 12300002021.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12020000321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020000329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2075975 + ... + 2081756.

It is an arithmetic number, because the mean of its divisors is an integer number (1184953620).

Almost surely, 2^12020000321 is an apocalyptic number.

It is an amenable number.

12020000321 is a deficient number, since it is larger than the sum of its proper divisors (2199443119).

12020000321 is an equidigital number, since it uses as much as digits as its factorization.

12020000321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157804 (or 4157797 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 12020000321 its reverse (12300002021), we get a palindrome (24320002342).

The spelling of 12020000321 in words is "twelve billion, twenty million, three hundred twenty-one", and thus it is an aban number.