12641263321 has 2 divisors, whose sum is σ = 12641263322. Its totient is φ = 12641263320.

The previous prime is 12641263309. The next prime is 12641263361. The reversal of 12641263321 is 12336214621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9132478096 + 3508785225 = 95564^2 + 59235^2 .

It is an emirp because it is prime and its reverse (12336214621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12641263321 is a prime.

It is not a weakly prime, because it can be changed into another prime (12641263361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320631660 + 6320631661.

It is an arithmetic number, because the mean of its divisors is an integer number (6320631661).

Almost surely, 2^12641263321 is an apocalyptic number.

It is an amenable number.

12641263321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12641263321 is an equidigital number, since it uses as much as digits as its factorization.

12641263321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

Adding to 12641263321 its reverse (12336214621), we get a palindrome (24977477942).

The spelling of 12641263321 in words is "twelve billion, six hundred forty-one million, two hundred sixty-three thousand, three hundred twenty-one".