4021344200021 has 2 divisors, whose sum is σ = 4021344200022. Its totient is φ = 4021344200020.

The previous prime is 4021344199969. The next prime is 4021344200131. The reversal of 4021344200021 is 1200024431204.

4021344200021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3945050026225 + 76294173796 = 1986215^2 + 276214^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021344200021 - 2²⁶ = 4021277091157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4021344200021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021344200921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010672100010 + 2010672100011.

It is an arithmetic number, because the mean of its divisors is an integer number (2010672100011).

Almost surely, 2^{4021344200021} is an apocalyptic number.

It is an amenable number.

4021344200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021344200021 is an equidigital number, since it uses as much as digits as its factorization.

4021344200021 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 23.

Adding to 4021344200021 its reverse (1200024431204), we get a palindrome (5221368631225).

The spelling of 4021344200021 in words is "four trillion, twenty-one billion, three hundred forty-four million, two hundred thousand, twenty-one".