4021441444421 has 4 divisors (see below), whose sum is σ = 4021710110700. Its totient is φ = 4021172778144.

The previous prime is 4021441444387. The next prime is 4021441444469. The reversal of 4021441444421 is 1244441441204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 140486284225 + 3880955160196 = 374815^2 + 1970014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021441444421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021441441421) 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 in 3 ways as a sum of consecutive naturals, for example, 134310686 + ... + 134340623.

It is an arithmetic number, because the mean of its divisors is an integer number (1005427527675).

Almost surely, 2^{4021441444421} is an apocalyptic number.

It is an amenable number.

4021441444421 is a deficient number, since it is larger than the sum of its proper divisors (268666279).

4021441444421 is a wasteful number, since it uses less digits than its factorization.

4021441444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268666278.

The product of its (nonzero) digits is 65536, while the sum is 35.

Adding to 4021441444421 its reverse (1244441441204), we get a palindrome (5265882885625).

The spelling of 4021441444421 in words is "four trillion, twenty-one billion, four hundred forty-one million, four hundred forty-four thousand, four hundred twenty-one".