144440123221 has 2 divisors, whose sum is σ = 144440123222. Its totient is φ = 144440123220.

The previous prime is 144440123209. The next prime is 144440123249. The reversal of 144440123221 is 122321044441.

144440123221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (144440123249) can be obtained adding 144440123221 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144125770321 + 314352900 = 379639^2 + 17730^2 .

It is a cyclic number.

It is not a de Polignac number, because 144440123221 - 2³³ = 135850188629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144440123221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144440123521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72220061610 + 72220061611.

It is an arithmetic number, because the mean of its divisors is an integer number (72220061611).

Almost surely, 2^144440123221 is an apocalyptic number.

It is an amenable number.

144440123221 is a deficient number, since it is larger than the sum of its proper divisors (1).

144440123221 is an equidigital number, since it uses as much as digits as its factorization.

144440123221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 144440123221 its reverse (122321044441), we get a palindrome (266761167662).

The spelling of 144440123221 in words is "one hundred forty-four billion, four hundred forty million, one hundred twenty-three thousand, two hundred twenty-one".