4021443204021 has 6 divisors (see below), whose sum is σ = 5808751294710. Its totient is φ = 2680962136008.

The previous prime is 4021443203977. The next prime is 4021443204089. The reversal of 4021443204021 is 1204023441204.

4021443204021 is a `hidden beast` number, since 4 + 0 + 214 + 43 + 2 + 0 + 402 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3349394118225 + 672049085796 = 1830135^2 + 819786^2 .

It is not a de Polignac number, because 4021443204021 - 2⁹ = 4021443203509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021443204091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 223413511326 + ... + 223413511343.

It is an arithmetic number, because the mean of its divisors is an integer number (968125215785).

Almost surely, 2^{4021443204021} is an apocalyptic number.

It is an amenable number.

4021443204021 is a deficient number, since it is larger than the sum of its proper divisors (1787308090689).

4021443204021 is a wasteful number, since it uses less digits than its factorization.

4021443204021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446827022675 (or 446827022672 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 4021443204021 its reverse (1204023441204), we get a palindrome (5225466645225).

The spelling of 4021443204021 in words is "four trillion, twenty-one billion, four hundred forty-three million, two hundred four thousand, twenty-one".