4243434424221 has 16 divisors (see below), whose sum is σ = 5769799148736. Its totient is φ = 2773108056576.

The previous prime is 4243434424193. The next prime is 4243434424259. The reversal of 4243434424221 is 1224244343424.

4243434424221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4243434424221 - 2⁵ = 4243434424189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4243434424221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243434420221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11704020 + ... + 12061133.

It is an arithmetic number, because the mean of its divisors is an integer number (360612446796).

Almost surely, 2^{4243434424221} is an apocalyptic number.

It is an amenable number.

4243434424221 is a deficient number, since it is larger than the sum of its proper divisors (1526364724515).

4243434424221 is a wasteful number, since it uses less digits than its factorization.

4243434424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23766332.

The product of its digits is 589824, while the sum is 39.

Adding to 4243434424221 its reverse (1224244343424), we get a palindrome (5467678767645).

The spelling of 4243434424221 in words is "four trillion, two hundred forty-three billion, four hundred thirty-four million, four hundred twenty-four thousand, two hundred twenty-one".