1321683318719 has 2 divisors, whose sum is σ = 1321683318720. Its totient is φ = 1321683318718.

The previous prime is 1321683318701. The next prime is 1321683318731. The reversal of 1321683318719 is 9178133861231.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321683318719 - 2¹⁶ = 1321683253183 is a prime.

It is a super-2 number, since 2×1321683318719² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321683318799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660841659359 + 660841659360.

It is an arithmetic number, because the mean of its divisors is an integer number (660841659360).

Almost surely, 2^{1321683318719} is an apocalyptic number.

1321683318719 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321683318719 is an equidigital number, since it uses as much as digits as its factorization.

1321683318719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 53.

The spelling of 1321683318719 in words is "one trillion, three hundred twenty-one billion, six hundred eighty-three million, three hundred eighteen thousand, seven hundred nineteen".