4242230221 has 2 divisors, whose sum is σ = 4242230222. Its totient is φ = 4242230220.

The previous prime is 4242230219. The next prime is 4242230233. The reversal of 4242230221 is 1220322424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2370716100 + 1871514121 = 48690^2 + 43261^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242230221 - 2¹ = 4242230219 is a prime.

Together with 4242230219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4242230192 and 4242230201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4242230621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121115110 + 2121115111.

It is an arithmetic number, because the mean of its divisors is an integer number (2121115111).

Almost surely, 2^4242230221 is an apocalyptic number.

It is an amenable number.

4242230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4242230221 is an equidigital number, since it uses as much as digits as its factorization.

4242230221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4242230221 is about 65132.4053064218. The cubic root of 4242230221 is about 1618.8181977976.

Adding to 4242230221 its reverse (1220322424), we get a palindrome (5462552645).

The spelling of 4242230221 in words is "four billion, two hundred forty-two million, two hundred thirty thousand, two hundred twenty-one".