4242201200021 has 2 divisors, whose sum is σ = 4242201200022. Its totient is φ = 4242201200020.

The previous prime is 4242201199997. The next prime is 4242201200089. The reversal of 4242201200021 is 1200021022424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3268722977521 + 973478222500 = 1807961^2 + 986650^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242201200021 - 2¹⁰ = 4242201198997 is a prime.

It is a super-2 number, since 2×4242201200021² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4242201199966 and 4242201200002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4242201200221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121100600010 + 2121100600011.

It is an arithmetic number, because the mean of its divisors is an integer number (2121100600011).

Almost surely, 2^{4242201200021} is an apocalyptic number.

It is an amenable number.

4242201200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4242201200021 is an equidigital number, since it uses as much as digits as its factorization.

4242201200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 4242201200021 its reverse (1200021022424), we get a palindrome (5442222222445).

The spelling of 4242201200021 in words is "four trillion, two hundred forty-two billion, two hundred one million, two hundred thousand, twenty-one".