13413320321 has 4 divisors (see below), whose sum is σ = 13422270000. Its totient is φ = 13404370644.

The previous prime is 13413320299. The next prime is 13413320329. The reversal of 13413320321 is 12302331431.

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 a de Polignac number, because none of the positive numbers 2^k-13413320321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13413320329) 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, 4472591 + ... + 4475588.

It is an arithmetic number, because the mean of its divisors is an integer number (3355567500).

Almost surely, 2^13413320321 is an apocalyptic number.

It is an amenable number.

13413320321 is a deficient number, since it is larger than the sum of its proper divisors (8949679).

13413320321 is an equidigital number, since it uses as much as digits as its factorization.

13413320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8949678.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 13413320321 its reverse (12302331431), we get a palindrome (25715651752).

The spelling of 13413320321 in words is "thirteen billion, four hundred thirteen million, three hundred twenty thousand, three hundred twenty-one".