1320023321999 has 2 divisors, whose sum is σ = 1320023322000. Its totient is φ = 1320023321998.

The previous prime is 1320023321993. The next prime is 1320023322041. The reversal of 1320023321999 is 9991233200231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320023321999 - 2⁴⁰ = 220511694223 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320023321993) 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, 660011660999 + 660011661000.

It is an arithmetic number, because the mean of its divisors is an integer number (660011661000).

Almost surely, 2^{1320023321999} is an apocalyptic number.

1320023321999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320023321999 is an equidigital number, since it uses as much as digits as its factorization.

1320023321999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 44.

The spelling of 1320023321999 in words is "one trillion, three hundred twenty billion, twenty-three million, three hundred twenty-one thousand, nine hundred ninety-nine".