1323123113321 has 2 divisors, whose sum is σ = 1323123113322. Its totient is φ = 1323123113320.

The previous prime is 1323123113317. The next prime is 1323123113329. The reversal of 1323123113321 is 1233113213231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1129161264400 + 193961848921 = 1062620^2 + 440411^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323123113321 - 2² = 1323123113317 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1323123113329) 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, 661561556660 + 661561556661.

It is an arithmetic number, because the mean of its divisors is an integer number (661561556661).

Almost surely, 2^{1323123113321} is an apocalyptic number.

It is an amenable number.

1323123113321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323123113321 is an equidigital number, since it uses as much as digits as its factorization.

1323123113321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 26.

Adding to 1323123113321 its reverse (1233113213231), we get a palindrome (2556236326552).

The spelling of 1323123113321 in words is "one trillion, three hundred twenty-three billion, one hundred twenty-three million, one hundred thirteen thousand, three hundred twenty-one".