12403342321 has 2 divisors, whose sum is σ = 12403342322. Its totient is φ = 12403342320.

The previous prime is 12403342277. The next prime is 12403342339. The reversal of 12403342321 is 12324330421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10879533025 + 1523809296 = 104305^2 + 39036^2 .

It is a cyclic number.

It is not a de Polignac number, because 12403342321 - 2¹⁹ = 12402818033 is a prime.

It is not a weakly prime, because it can be changed into another prime (12403342421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6201671160 + 6201671161.

It is an arithmetic number, because the mean of its divisors is an integer number (6201671161).

Almost surely, 2^12403342321 is an apocalyptic number.

It is an amenable number.

12403342321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12403342321 is an equidigital number, since it uses as much as digits as its factorization.

12403342321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 12403342321 its reverse (12324330421), we get a palindrome (24727672742).

The spelling of 12403342321 in words is "twelve billion, four hundred three million, three hundred forty-two thousand, three hundred twenty-one".