4021444342421 has 8 divisors (see below), whose sum is σ = 4387219346784. Its totient is φ = 3655700863920.

The previous prime is 4021444342403. The next prime is 4021444342423. The reversal of 4021444342421 is 1242434441204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4021444342421 - 2¹⁴ = 4021444326037 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 (4021444342423) 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 7 ways as a sum of consecutive naturals, for example, 7614350 + ... + 8125343.

It is an arithmetic number, because the mean of its divisors is an integer number (548402418348).

Almost surely, 2^{4021444342421} is an apocalyptic number.

It is an amenable number.

4021444342421 is a deficient number, since it is larger than the sum of its proper divisors (365775004363).

4021444342421 is a wasteful number, since it uses less digits than its factorization.

4021444342421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15762931.

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

Adding to 4021444342421 its reverse (1242434441204), we get a palindrome (5263878783625).

The spelling of 4021444342421 in words is "four trillion, twenty-one billion, four hundred forty-four million, three hundred forty-two thousand, four hundred twenty-one".