13220012321 has 8 divisors (see below), whose sum is σ = 13563163680. Its totient is φ = 12878484192.

The previous prime is 13220012303. The next prime is 13220012359. The reversal of 13220012321 is 12321002231.

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

It is a cyclic number.

It is not a de Polignac number, because 13220012321 - 2¹⁰ = 13220011297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13220012321.

It is not an unprimeable number, because it can be changed into a prime (13220012371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389300 + ... + 421893.

It is an arithmetic number, because the mean of its divisors is an integer number (1695395460).

Almost surely, 2^13220012321 is an apocalyptic number.

It is an amenable number.

13220012321 is a deficient number, since it is larger than the sum of its proper divisors (343151359).

13220012321 is an equidigital number, since it uses as much as digits as its factorization.

13220012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811615.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13220012321 its reverse (12321002231), we get a palindrome (25541014552).

The spelling of 13220012321 in words is "thirteen billion, two hundred twenty million, twelve thousand, three hundred twenty-one".