4021444324421 has 4 divisors (see below), whose sum is σ = 4032401938752. Its totient is φ = 4010486710092.

The previous prime is 4021444324393. The next prime is 4021444324481. The reversal of 4021444324421 is 1244234441204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4021444324421 - 2³⁰ = 4020370582597 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 (4021444324481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5478806615 + ... + 5478807348.

It is an arithmetic number, because the mean of its divisors is an integer number (1008100484688).

Almost surely, 2^{4021444324421} is an apocalyptic number.

It is an amenable number.

4021444324421 is a deficient number, since it is larger than the sum of its proper divisors (10957614331).

4021444324421 is a wasteful number, since it uses less digits than its factorization.

4021444324421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10957614330.

The product of its (nonzero) digits is 98304, while the sum is 35.

Adding to 4021444324421 its reverse (1244234441204), we get a palindrome (5265678765625).

The spelling of 4021444324421 in words is "four trillion, twenty-one billion, four hundred forty-four million, three hundred twenty-four thousand, four hundred twenty-one".