12432413221 has 2 divisors, whose sum is σ = 12432413222. Its totient is φ = 12432413220.

The previous prime is 12432413209. The next prime is 12432413237. The reversal of 12432413221 is 12231423421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6578021025 + 5854392196 = 81105^2 + 76514^2 .

It is a cyclic number.

It is not a de Polignac number, because 12432413221 - 2¹⁵ = 12432380453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12432413281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6216206610 + 6216206611.

It is an arithmetic number, because the mean of its divisors is an integer number (6216206611).

Almost surely, 2^12432413221 is an apocalyptic number.

It is an amenable number.

12432413221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12432413221 is an equidigital number, since it uses as much as digits as its factorization.

12432413221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

Adding to 12432413221 its reverse (12231423421), we get a palindrome (24663836642).

The spelling of 12432413221 in words is "twelve billion, four hundred thirty-two million, four hundred thirteen thousand, two hundred twenty-one".