13221221132 has 12 divisors (see below), whose sum is σ = 26442442320. Its totient is φ = 5666237616.

The previous prime is 13221221089. The next prime is 13221221171. The reversal of 13221221132 is 23112212231.

13221221132 is an admirable number.

It is a super-2 number, since 2×13221221132² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236093207 + ... + 236093262.

It is an arithmetic number, because the mean of its divisors is an integer number (2203536860).

Almost surely, 2^13221221132 is an apocalyptic number.

It is an amenable number.

13221221132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13221221132 is a wasteful number, since it uses less digits than its factorization.

13221221132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472186480 (or 472186478 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 13221221132 its reverse (23112212231), we get a palindrome (36333433363).

The spelling of 13221221132 in words is "thirteen billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred thirty-two".