13320221144 has 8 divisors (see below), whose sum is σ = 24975414660. Its totient is φ = 6660110568.

The previous prime is 13320221071. The next prime is 13320221197. The reversal of 13320221144 is 44112202331.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832513814 + ... + 832513829.

Almost surely, 2^13320221144 is an apocalyptic number.

It is an amenable number.

13320221144 is a deficient number, since it is larger than the sum of its proper divisors (11655193516).

13320221144 is a wasteful number, since it uses less digits than its factorization.

13320221144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665027649 (or 1665027645 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 13320221144 its reverse (44112202331), we get a palindrome (57432423475).

The spelling of 13320221144 in words is "thirteen billion, three hundred twenty million, two hundred twenty-one thousand, one hundred forty-four".