1321433303321 has 2 divisors, whose sum is σ = 1321433303322. Its totient is φ = 1321433303320.

The previous prime is 1321433303293. The next prime is 1321433303327. The reversal of 1321433303321 is 1233033341231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 679287507721 + 642145795600 = 824189^2 + 801340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321433303321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321433303327) 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, 660716651660 + 660716651661.

It is an arithmetic number, because the mean of its divisors is an integer number (660716651661).

Almost surely, 2^{1321433303321} is an apocalyptic number.

It is an amenable number.

1321433303321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321433303321 is an equidigital number, since it uses as much as digits as its factorization.

1321433303321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 1321433303321 its reverse (1233033341231), we get a palindrome (2554466644552).

The spelling of 1321433303321 in words is "one trillion, three hundred twenty-one billion, four hundred thirty-three million, three hundred three thousand, three hundred twenty-one".