4021443203509 has 2 divisors, whose sum is σ = 4021443203510. Its totient is φ = 4021443203508.

The previous prime is 4021443203501. The next prime is 4021443203521. The reversal of 4021443203509 is 9053023441204.

4021443203509 is digitally balanced in base 3, 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., 2367382276900 + 1654060926609 = 1538630^2 + 1286103^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021443203509 - 2³ = 4021443203501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021443203501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010721601754 + 2010721601755.

It is an arithmetic number, because the mean of its divisors is an integer number (2010721601755).

Almost surely, 2^{4021443203509} is an apocalyptic number.

It is an amenable number.

4021443203509 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021443203509 is an equidigital number, since it uses as much as digits as its factorization.

4021443203509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 4021443203509 in words is "four trillion, twenty-one billion, four hundred forty-three million, two hundred three thousand, five hundred nine".