4202444221 has 2 divisors, whose sum is σ = 4202444222. Its totient is φ = 4202444220.

The previous prime is 4202444203. The next prime is 4202444249. The reversal of 4202444221 is 1224442024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2363320996 + 1839123225 = 48614^2 + 42885^2 .

It is a cyclic number.

It is not a de Polignac number, because 4202444221 - 2⁵ = 4202444189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4202444261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2101222110 + 2101222111.

It is an arithmetic number, because the mean of its divisors is an integer number (2101222111).

Almost surely, 2^4202444221 is an apocalyptic number.

It is an amenable number.

4202444221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4202444221 is an equidigital number, since it uses as much as digits as its factorization.

4202444221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 4202444221 is about 64826.2618157179. The cubic root of 4202444221 is about 1613.7415675665.

Adding to 4202444221 its reverse (1224442024), we get a palindrome (5426886245).

The spelling of 4202444221 in words is "four billion, two hundred two million, four hundred forty-four thousand, two hundred twenty-one".