12432040217 has 2 divisors, whose sum is σ = 12432040218. Its totient is φ = 12432040216.

The previous prime is 12432040193. The next prime is 12432040249. The reversal of 12432040217 is 71204023421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12287944201 + 144096016 = 110851^2 + 12004^2 .

It is an emirp because it is prime and its reverse (71204023421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12432040217 is a prime.

It is not a weakly prime, because it can be changed into another prime (12432040277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6216020108 + 6216020109.

It is an arithmetic number, because the mean of its divisors is an integer number (6216020109).

Almost surely, 2^12432040217 is an apocalyptic number.

It is an amenable number.

12432040217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12432040217 is an equidigital number, since it uses as much as digits as its factorization.

12432040217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 12432040217 its reverse (71204023421), we get a palindrome (83636063638).

The spelling of 12432040217 in words is "twelve billion, four hundred thirty-two million, forty thousand, two hundred seventeen".