1321313421343 has 8 divisors (see below), whose sum is σ = 1352104572368. Its totient is φ = 1290525130944.

The previous prime is 1321313421287. The next prime is 1321313421391. The reversal of 1321313421343 is 3431243131231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321313421343 - 2²¹ = 1321311324191 is a prime.

It is a super-2 number, since 2×1321313421343² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321313421443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233905 + ... + 1642357.

It is an arithmetic number, because the mean of its divisors is an integer number (169013071546).

Almost surely, 2^{1321313421343} is an apocalyptic number.

1321313421343 is a deficient number, since it is larger than the sum of its proper divisors (30791151025).

1321313421343 is a wasteful number, since it uses less digits than its factorization.

1321313421343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430313.

The product of its digits is 15552, while the sum is 31.

Adding to 1321313421343 its reverse (3431243131231), we get a palindrome (4752556552574).

The spelling of 1321313421343 in words is "one trillion, three hundred twenty-one billion, three hundred thirteen million, four hundred twenty-one thousand, three hundred forty-three".