144444541221 has 40 divisors (see below), whose sum is σ = 223374808800. Its totient is φ = 92909527200.

The previous prime is 144444541207. The next prime is 144444541249. The reversal of 144444541221 is 122145444441.

144444541221 is a `hidden beast` number, since 1 + 44 + 44 + 454 + 122 + 1 = 666.

It is not a de Polignac number, because 144444541221 - 2¹⁰ = 144444540197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144444540221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3387210 + ... + 3429588.

It is an arithmetic number, because the mean of its divisors is an integer number (5584370220).

Almost surely, 2^144444541221 is an apocalyptic number.

It is an amenable number.

144444541221 is a deficient number, since it is larger than the sum of its proper divisors (78930267579).

144444541221 is a wasteful number, since it uses less digits than its factorization.

144444541221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43871 (or 43862 counting only the distinct ones).

The product of its digits is 81920, while the sum is 36.

Adding to 144444541221 its reverse (122145444441), we get a palindrome (266589985662).

The spelling of 144444541221 in words is "one hundred forty-four billion, four hundred forty-four million, five hundred forty-one thousand, two hundred twenty-one".