13221033444 has 36 divisors (see below), whose sum is σ = 33744308416. Its totient is φ = 4364223408.

The previous prime is 13221033403. The next prime is 13221033451. The reversal of 13221033444 is 44433012231.

13221033444 is a `hidden beast` number, since 1 + 3 + 2 + 210 + 3 + 3 + 444 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×13221033444² (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 11 ways as a sum of consecutive naturals, for example, 1779064 + ... + 1786479.

Almost surely, 2^13221033444 is an apocalyptic number.

It is an amenable number.

13221033444 is an abundant number, since it is smaller than the sum of its proper divisors (20523274972).

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

13221033444 is a wasteful number, since it uses less digits than its factorization.

13221033444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3565656 (or 3565651 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 13221033444 its reverse (44433012231), we get a palindrome (57654045675).

The spelling of 13221033444 in words is "thirteen billion, two hundred twenty-one million, thirty-three thousand, four hundred forty-four".