13221252144 has 60 divisors (see below), whose sum is σ = 38948579800. Its totient is φ = 4175131392.

The previous prime is 13221252137. The next prime is 13221252151. The reversal of 13221252144 is 44125212231.

13221252144 is a `hidden beast` number, since 1 + 322 + 125 + 214 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (13221252137) and next prime (13221252151).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2413429 + ... + 2418900.

Almost surely, 2^13221252144 is an apocalyptic number.

It is an amenable number.

13221252144 is an abundant number, since it is smaller than the sum of its proper divisors (25727327656).

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

13221252144 is a wasteful number, since it uses less digits than its factorization.

13221252144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4832362 (or 4832353 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

Adding to 13221252144 its reverse (44125212231), we get a palindrome (57346464375).

The spelling of 13221252144 in words is "thirteen billion, two hundred twenty-one million, two hundred fifty-two thousand, one hundred forty-four".