13221322 has 16 divisors (see below), whose sum is σ = 20281032. Its totient is φ = 6462720.

The previous prime is 13221317. The next prime is 13221337. The reversal of 13221322 is 22312231.

It can be written as a sum of positive squares in 4 ways, for example, as 12895281 + 326041 = 3591^2 + 571^2 .

It is a super-3 number, since 3×13221322³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13221296 and 13221305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19672 + ... + 20332.

Almost surely, 2^13221322 is an apocalyptic number.

13221322 is a deficient number, since it is larger than the sum of its proper divisors (7059710).

13221322 is a wasteful number, since it uses less digits than its factorization.

13221322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873.

The product of its digits is 144, while the sum is 16.

The square root of 13221322 is about 3636.1135845845. The cubic root of 13221322 is about 236.4603315237.

Adding to 13221322 its reverse (22312231), we get a palindrome (35533553).

Subtracting 13221322 from its reverse (22312231), we obtain a palindrome (9090909).

The spelling of 13221322 in words is "thirteen million, two hundred twenty-one thousand, three hundred twenty-two".