1321335345329 has 2 divisors, whose sum is σ = 1321335345330. Its totient is φ = 1321335345328.

The previous prime is 1321335345289. The next prime is 1321335345371. The reversal of 1321335345329 is 9235435331231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1304655106225 + 16680239104 = 1142215^2 + 129152^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321335345329 - 2¹² = 1321335341233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321335345329.

It is not a weakly prime, because it can be changed into another prime (1321335342329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660667672664 + 660667672665.

It is an arithmetic number, because the mean of its divisors is an integer number (660667672665).

Almost surely, 2^{1321335345329} is an apocalyptic number.

It is an amenable number.

1321335345329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321335345329 is an equidigital number, since it uses as much as digits as its factorization.

1321335345329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 44.

The spelling of 1321335345329 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-five million, three hundred forty-five thousand, three hundred twenty-nine".