4021444421020 has 96 divisors (see below), whose sum is σ = 9220555516032. Its totient is φ = 1464291053568.

The previous prime is 4021444421017. The next prime is 4021444421023. The reversal of 4021444421020 is 201244441204.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4021444421017) and next prime (4021444421023).

It is a self number, because there is not a number n which added to its sum of digits gives 4021444421020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021444421023) 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 31 ways as a sum of consecutive naturals, for example, 206929224 + ... + 206948656.

It is an arithmetic number, because the mean of its divisors is an integer number (96047453292).

Almost surely, 2^{4021444421020} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4021444421020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4610277758016).

4021444421020 is an abundant number, since it is smaller than the sum of its proper divisors (5199111095012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4021444421020 is a wasteful number, since it uses less digits than its factorization.

4021444421020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30431 (or 30429 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 4021444421020 its reverse (201244441204), we get a palindrome (4222688862224).

The spelling of 4021444421020 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred twenty-one thousand, twenty".