144242223424221 has 128 divisors (see below), whose sum is σ = 228092092300800. Its totient is φ = 80225740062720.

The previous prime is 144242223424109. The next prime is 144242223424231. The reversal of 144242223424221 is 122424322242441.

It is not a de Polignac number, because 144242223424221 - 2²³ = 144242215035613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 144242223424221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144242223424231) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4456167925 + ... + 4456200293.

It is an arithmetic number, because the mean of its divisors is an integer number (1781969471100).

Almost surely, 2^{144242223424221} is an apocalyptic number.

It is an amenable number.

144242223424221 is a deficient number, since it is larger than the sum of its proper divisors (83849868876579).

144242223424221 is a wasteful number, since it uses less digits than its factorization.

144242223424221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33679.

The product of its digits is 393216, while the sum is 39.

Adding to 144242223424221 its reverse (122424322242441), we get a palindrome (266666545666662).

The spelling of 144242223424221 in words is "one hundred forty-four trillion, two hundred forty-two billion, two hundred twenty-three million, four hundred twenty-four thousand, two hundred twenty-one".