13230221321 has 4 divisors (see below), whose sum is σ = 14008469652. Its totient is φ = 12451972992.

The previous prime is 13230221311. The next prime is 13230221359. The reversal of 13230221321 is 12312203231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11149036921 + 2081184400 = 105589^2 + 45620^2 .

It is a cyclic number.

It is not a de Polignac number, because 13230221321 - 2¹⁴ = 13230204937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13230221293 and 13230221302.

It is not an unprimeable number, because it can be changed into a prime (13230221311) 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, 389124140 + ... + 389124173.

It is an arithmetic number, because the mean of its divisors is an integer number (3502117413).

Almost surely, 2^13230221321 is an apocalyptic number.

It is an amenable number.

13230221321 is a deficient number, since it is larger than the sum of its proper divisors (778248331).

13230221321 is an equidigital number, since it uses as much as digits as its factorization.

13230221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778248330.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13230221321 its reverse (12312203231), we get a palindrome (25542424552).

The spelling of 13230221321 in words is "thirteen billion, two hundred thirty million, two hundred twenty-one thousand, three hundred twenty-one".