12340240321 has 2 divisors, whose sum is σ = 12340240322. Its totient is φ = 12340240320.

The previous prime is 12340240309. The next prime is 12340240357. The reversal of 12340240321 is 12304204321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12202295296 + 137945025 = 110464^2 + 11745^2 .

It is an emirp because it is prime and its reverse (12304204321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12340240321 - 2⁹ = 12340239809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12340240292 and 12340240301.

It is not a weakly prime, because it can be changed into another prime (12340240361) by changing a digit.

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, 6170120160 + 6170120161.

It is an arithmetic number, because the mean of its divisors is an integer number (6170120161).

Almost surely, 2^12340240321 is an apocalyptic number.

It is an amenable number.

12340240321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340240321 is an equidigital number, since it uses as much as digits as its factorization.

12340240321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 12340240321 its reverse (12304204321), we get a palindrome (24644444642).

The spelling of 12340240321 in words is "twelve billion, three hundred forty million, two hundred forty thousand, three hundred twenty-one".