13221502144 has 28 divisors (see below), whose sum is σ = 26268172000. Its totient is φ = 6602750208.

The previous prime is 13221502121. The next prime is 13221502171. The reversal of 13221502144 is 44120512231.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71544 + ... + 177655.

It is an arithmetic number, because the mean of its divisors is an integer number (938149000).

Almost surely, 2^13221502144 is an apocalyptic number.

It is an amenable number.

13221502144 is a deficient number, since it is larger than the sum of its proper divisors (13046669856).

13221502144 is an equidigital number, since it uses as much as digits as its factorization.

13221502144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250040 (or 250030 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 13221502144 in words is "thirteen billion, two hundred twenty-one million, five hundred two thousand, one hundred forty-four".