13221025321 has 8 divisors (see below), whose sum is σ = 15116299904. Its totient is φ = 11327389920.

The previous prime is 13221025319. The next prime is 13221025339. The reversal of 13221025321 is 12352012231.

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

It is not a de Polignac number, because 13221025321 - 2¹ = 13221025319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221025292 and 13221025301.

It is not an unprimeable number, because it can be changed into a prime (13221025361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392460 + ... + 424813.

It is an arithmetic number, because the mean of its divisors is an integer number (1889537488).

Almost surely, 2^13221025321 is an apocalyptic number.

It is an amenable number.

13221025321 is a deficient number, since it is larger than the sum of its proper divisors (1895274583).

13221025321 is an equidigital number, since it uses as much as digits as its factorization.

13221025321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819591.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 13221025321 its reverse (12352012231), we get a palindrome (25573037552).

The spelling of 13221025321 in words is "thirteen billion, two hundred twenty-one million, twenty-five thousand, three hundred twenty-one".