13313120321 has 4 divisors (see below), whose sum is σ = 13316068272. Its totient is φ = 13310172372.

The previous prime is 13313120309. The next prime is 13313120323. The reversal of 13313120321 is 12302131331.

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-13313120321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13313120293 and 13313120302.

It is not an unprimeable number, because it can be changed into a prime (13313120323) 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, 1467191 + ... + 1476236.

It is an arithmetic number, because the mean of its divisors is an integer number (3329017068).

Almost surely, 2^13313120321 is an apocalyptic number.

It is an amenable number.

13313120321 is a deficient number, since it is larger than the sum of its proper divisors (2947951).

13313120321 is an equidigital number, since it uses as much as digits as its factorization.

13313120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947950.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13313120321 its reverse (12302131331), we get a palindrome (25615251652).

The spelling of 13313120321 in words is "thirteen billion, three hundred thirteen million, one hundred twenty thousand, three hundred twenty-one".