4443241221 has 6 divisors (see below), whose sum is σ = 6418015110. Its totient is φ = 2962160808.

The previous prime is 4443241199. The next prime is 4443241249. The reversal of 4443241221 is 1221423444.

4443241221 is a `hidden beast` number, since 4 + 4 + 432 + 4 + 1 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3897504900 + 545736321 = 62430^2 + 23361^2 .

It is not a de Polignac number, because 4443241221 - 2¹³ = 4443233029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4443241291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 246846726 + ... + 246846743.

It is an arithmetic number, because the mean of its divisors is an integer number (1069669185).

Almost surely, 2^4443241221 is an apocalyptic number.

It is an amenable number.

4443241221 is a deficient number, since it is larger than the sum of its proper divisors (1974773889).

4443241221 is a wasteful number, since it uses less digits than its factorization.

4443241221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493693475 (or 493693472 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

The square root of 4443241221 is about 66657.6418799825. The cubic root of 4443241221 is about 1643.9929992864.

Adding to 4443241221 its reverse (1221423444), we get a palindrome (5664664665).

The spelling of 4443241221 in words is "four billion, four hundred forty-three million, two hundred forty-one thousand, two hundred twenty-one".