1323181273321 has 2 divisors, whose sum is σ = 1323181273322. Its totient is φ = 1323181273320.

The previous prime is 1323181273313. The next prime is 1323181273423. The reversal of 1323181273321 is 1233721813231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 834964647696 + 488216625625 = 913764^2 + 698725^2 .

It is an emirp because it is prime and its reverse (1233721813231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323181273321 - 2³ = 1323181273313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1323182273321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661590636660 + 661590636661.

It is an arithmetic number, because the mean of its divisors is an integer number (661590636661).

Almost surely, 2^{1323181273321} is an apocalyptic number.

It is an amenable number.

1323181273321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323181273321 is an equidigital number, since it uses as much as digits as its factorization.

1323181273321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The spelling of 1323181273321 in words is "one trillion, three hundred twenty-three billion, one hundred eighty-one million, two hundred seventy-three thousand, three hundred twenty-one".