1321423430399 has 2 divisors, whose sum is σ = 1321423430400. Its totient is φ = 1321423430398.

The previous prime is 1321423430387. The next prime is 1321423430441. The reversal of 1321423430399 is 9930343241231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321423430399 - 2²⁰ = 1321422381823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321423430699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660711715199 + 660711715200.

It is an arithmetic number, because the mean of its divisors is an integer number (660711715200).

Almost surely, 2^{1321423430399} is an apocalyptic number.

1321423430399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321423430399 is an equidigital number, since it uses as much as digits as its factorization.

1321423430399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 44.

The spelling of 1321423430399 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-three million, four hundred thirty thousand, three hundred ninety-nine".