144443320241221 has 8 divisors (see below), whose sum is σ = 153462614236920. Its totient is φ = 135693258902208.

The previous prime is 144443320241203. The next prime is 144443320241261. The reversal of 144443320241221 is 122142023344441.

It can be written as a sum of positive squares in 4 ways, for example, as 10109309276196 + 134334010965025 = 3179514^2 + 11590255^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144443320241221 - 2¹⁹ = 144443319716933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144443320241261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67308163066 + ... + 67308165211.

It is an arithmetic number, because the mean of its divisors is an integer number (19182826779615).

Almost surely, 2^{144443320241221} is an apocalyptic number.

It is an amenable number.

144443320241221 is a deficient number, since it is larger than the sum of its proper divisors (9019293995699).

144443320241221 is a wasteful number, since it uses less digits than its factorization.

144443320241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134616328343.

The product of its (nonzero) digits is 147456, while the sum is 37.

Adding to 144443320241221 its reverse (122142023344441), we get a palindrome (266585343585662).

The spelling of 144443320241221 in words is "one hundred forty-four trillion, four hundred forty-three billion, three hundred twenty million, two hundred forty-one thousand, two hundred twenty-one".