1321332232321 has 2 divisors, whose sum is σ = 1321332232322. Its totient is φ = 1321332232320.

The previous prime is 1321332232303. The next prime is 1321332232333. The reversal of 1321332232321 is 1232322331231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1293824351296 + 27507881025 = 1137464^2 + 165855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321332232321 - 2⁵ = 1321332232289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321332232321.

It is not a weakly prime, because it can be changed into another prime (1321332232721) 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, 660666116160 + 660666116161.

It is an arithmetic number, because the mean of its divisors is an integer number (660666116161).

Almost surely, 2^{1321332232321} is an apocalyptic number.

It is an amenable number.

1321332232321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321332232321 is an equidigital number, since it uses as much as digits as its factorization.

1321332232321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 28.

Adding to 1321332232321 its reverse (1232322331231), we get a palindrome (2553654563552).

The spelling of 1321332232321 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-two million, two hundred thirty-two thousand, three hundred twenty-one".