12023240321 has 2 divisors, whose sum is σ = 12023240322. Its totient is φ = 12023240320.

The previous prime is 12023240303. The next prime is 12023240347. The reversal of 12023240321 is 12304232021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10555507600 + 1467732721 = 102740^2 + 38311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12023240321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12023240293 and 12023240302.

It is not a weakly prime, because it can be changed into another prime (12023240371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6011620160 + 6011620161.

It is an arithmetic number, because the mean of its divisors is an integer number (6011620161).

Almost surely, 2^12023240321 is an apocalyptic number.

It is an amenable number.

12023240321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12023240321 is an equidigital number, since it uses as much as digits as its factorization.

12023240321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12023240321 its reverse (12304232021), we get a palindrome (24327472342).

The spelling of 12023240321 in words is "twelve billion, twenty-three million, two hundred forty thousand, three hundred twenty-one".