13221309244 has 96 divisors (see below), whose sum is σ = 28408697856. Its totient is φ = 5302644480.

The previous prime is 13221309209. The next prime is 13221309247. The reversal of 13221309244 is 44290312231.

It is a super-3 number, since 3×13221309244³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221309247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1150294 + ... + 1161730.

It is an arithmetic number, because the mean of its divisors is an integer number (295923936).

Almost surely, 2^13221309244 is an apocalyptic number.

It is an amenable number.

13221309244 is an abundant number, since it is smaller than the sum of its proper divisors (15187388612).

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

13221309244 is a wasteful number, since it uses less digits than its factorization.

13221309244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11555 (or 11553 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 13221309244 in words is "thirteen billion, two hundred twenty-one million, three hundred nine thousand, two hundred forty-four".