12321321361 has 2 divisors, whose sum is σ = 12321321362. Its totient is φ = 12321321360.

The previous prime is 12321321317. The next prime is 12321321391. The reversal of 12321321361 is 16312312321.

It is a happy number.

12321321361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11539056400 + 782264961 = 107420^2 + 27969^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321321361 - 2¹⁵ = 12321288593 is a prime.

It is not a weakly prime, because it can be changed into another prime (12321321391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160660680 + 6160660681.

It is an arithmetic number, because the mean of its divisors is an integer number (6160660681).

Almost surely, 2^12321321361 is an apocalyptic number.

It is an amenable number.

12321321361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321321361 is an equidigital number, since it uses as much as digits as its factorization.

12321321361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

Adding to 12321321361 its reverse (16312312321), we get a palindrome (28633633682).

The spelling of 12321321361 in words is "twelve billion, three hundred twenty-one million, three hundred twenty-one thousand, three hundred sixty-one".