12432215321 has 2 divisors, whose sum is σ = 12432215322. Its totient is φ = 12432215320.

The previous prime is 12432215281. The next prime is 12432215347. The reversal of 12432215321 is 12351223421.

It is an a-pointer prime, because the next prime (12432215347) can be obtained adding 12432215321 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10493134096 + 1939081225 = 102436^2 + 44035^2 .

It is an emirp because it is prime and its reverse (12351223421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12432215321 - 2¹⁰ = 12432214297 is a prime.

It is not a weakly prime, because it can be changed into another prime (12432215221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6216107660 + 6216107661.

It is an arithmetic number, because the mean of its divisors is an integer number (6216107661).

Almost surely, 2^12432215321 is an apocalyptic number.

It is an amenable number.

12432215321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12432215321 is an equidigital number, since it uses as much as digits as its factorization.

12432215321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

Adding to 12432215321 its reverse (12351223421), we get a palindrome (24783438742).

The spelling of 12432215321 in words is "twelve billion, four hundred thirty-two million, two hundred fifteen thousand, three hundred twenty-one".