13221033112 has 64 divisors (see below), whose sum is σ = 29956147200. Its totient is φ = 5343770880.

The previous prime is 13221033041. The next prime is 13221033173. The reversal of 13221033112 is 21133012231.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 13221033112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209412 + ... + 265132.

It is an arithmetic number, because the mean of its divisors is an integer number (468064800).

Almost surely, 2^13221033112 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 13221033112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14978073600).

13221033112 is an abundant number, since it is smaller than the sum of its proper divisors (16735114088).

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

13221033112 is a wasteful number, since it uses less digits than its factorization.

13221033112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55976 (or 55972 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13221033112 its reverse (21133012231), we get a palindrome (34354045343).

The spelling of 13221033112 in words is "thirteen billion, two hundred twenty-one million, thirty-three thousand, one hundred twelve".