13221222112 has 96 divisors (see below), whose sum is σ = 31798738944. Its totient is φ = 5287603200.

The previous prime is 13221222019. The next prime is 13221222137. The reversal of 13221222112 is 21122212231.

It is a self number, because there is not a number n which added to its sum of digits gives 13221222112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179937 + ... + 242527.

It is an arithmetic number, because the mean of its divisors is an integer number (331236864).

Almost surely, 2^13221222112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13221222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15899369472).

13221222112 is an abundant number, since it is smaller than the sum of its proper divisors (18577516832).

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

13221222112 is a wasteful number, since it uses less digits than its factorization.

13221222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62672 (or 62664 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

Adding to 13221222112 its reverse (21122212231), we get a palindrome (34343434343).

The spelling of 13221222112 in words is "thirteen billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twelve".