1321423430413 has 4 divisors (see below), whose sum is σ = 1322071506720. Its totient is φ = 1320775354108.

The previous prime is 1321423430399. The next prime is 1321423430441. The reversal of 1321423430413 is 3140343241231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1321423430413 - 2²⁹ = 1320886559501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321423430473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324035095 + ... + 324039172.

It is an arithmetic number, because the mean of its divisors is an integer number (330517876680).

Almost surely, 2^{1321423430413} is an apocalyptic number.

It is an amenable number.

1321423430413 is a deficient number, since it is larger than the sum of its proper divisors (648076307).

1321423430413 is an equidigital number, since it uses as much as digits as its factorization.

1321423430413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648076306.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 1321423430413 its reverse (3140343241231), we get a palindrome (4461766671644).

The spelling of 1321423430413 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-three million, four hundred thirty thousand, four hundred thirteen".