13321333221 has 32 divisors (see below), whose sum is σ = 21332686848. Its totient is φ = 7234194240.

The previous prime is 13321333217. The next prime is 13321333271. The reversal of 13321333221 is 12233312331.

It is not a de Polignac number, because 13321333221 - 2² = 13321333217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13321333191 and 13321333200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321333271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165945 + ... + 232766.

It is an arithmetic number, because the mean of its divisors is an integer number (666646464).

Almost surely, 2^13321333221 is an apocalyptic number.

It is an amenable number.

13321333221 is a deficient number, since it is larger than the sum of its proper divisors (8011353627).

13321333221 is a wasteful number, since it uses less digits than its factorization.

13321333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398801.

The product of its digits is 1944, while the sum is 24.

Adding to 13321333221 its reverse (12233312331), we get a palindrome (25554645552).

The spelling of 13321333221 in words is "thirteen billion, three hundred twenty-one million, three hundred thirty-three thousand, two hundred twenty-one".