13020321321 has 64 divisors (see below), whose sum is σ = 23046819840. Its totient is φ = 7103289600.

The previous prime is 13020321319. The next prime is 13020321407. The reversal of 13020321321 is 12312302031.

13020321321 is a `hidden beast` number, since 1 + 3 + 0 + 20 + 321 + 321 = 666.

It is not a de Polignac number, because 13020321321 - 2¹ = 13020321319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13020321294 and 13020321303.

It is not an unprimeable number, because it can be changed into a prime (13020321421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2575246 + ... + 2580296.

It is an arithmetic number, because the mean of its divisors is an integer number (360106560).

Almost surely, 2^13020321321 is an apocalyptic number.

It is an amenable number.

13020321321 is a deficient number, since it is larger than the sum of its proper divisors (10026498519).

13020321321 is a wasteful number, since it uses less digits than its factorization.

13020321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683 (or 5677 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13020321321 its reverse (12312302031), we get a palindrome (25332623352).

The spelling of 13020321321 in words is "thirteen billion, twenty million, three hundred twenty-one thousand, three hundred twenty-one".