4242204004021 has 2 divisors, whose sum is σ = 4242204004022. Its totient is φ = 4242204004020.

The previous prime is 4242204003997. The next prime is 4242204004057. The reversal of 4242204004021 is 1204004022424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4174200403396 + 68003600625 = 2043086^2 + 260775^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242204004021 - 2⁷ = 4242204003893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4242204004121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121102002010 + 2121102002011.

It is an arithmetic number, because the mean of its divisors is an integer number (2121102002011).

Almost surely, 2^{4242204004021} is an apocalyptic number.

It is an amenable number.

4242204004021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4242204004021 is an equidigital number, since it uses as much as digits as its factorization.

4242204004021 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.

Adding to 4242204004021 its reverse (1204004022424), we get a palindrome (5446208026445).

The spelling of 4242204004021 in words is "four trillion, two hundred forty-two billion, two hundred four million, four thousand, twenty-one".