144442433140221 has 12 divisors (see below), whose sum is σ = 193457415729408. Its totient is φ = 95863139384184.

The previous prime is 144442433140219. The next prime is 144442433140289. The reversal of 144442433140221 is 122041334244441.

It is a happy number.

It is not a de Polignac number, because 144442433140221 - 2¹ = 144442433140219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144442433140221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144442433140921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 483949405 + ... + 484247778.

It is an arithmetic number, because the mean of its divisors is an integer number (16121451310784).

Almost surely, 2^{144442433140221} is an apocalyptic number.

It is an amenable number.

144442433140221 is a deficient number, since it is larger than the sum of its proper divisors (49014982589187).

144442433140221 is an frugal number, since it uses more digits than its factorization.

144442433140221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968197632 (or 968197409 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 39.

Adding to 144442433140221 its reverse (122041334244441), we get a palindrome (266483767384662).

The spelling of 144442433140221 in words is "one hundred forty-four trillion, four hundred forty-two billion, four hundred thirty-three million, one hundred forty thousand, two hundred twenty-one".