4421224021 has 4 divisors (see below), whose sum is σ = 4422312000. Its totient is φ = 4420136044.

The previous prime is 4421223977. The next prime is 4421224039. The reversal of 4421224021 is 1204221244.

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 4421224021 - 2²⁷ = 4287006293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4421223983 and 4421224001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421224321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537871 + ... + 546028.

It is an arithmetic number, because the mean of its divisors is an integer number (1105578000).

Almost surely, 2^4421224021 is an apocalyptic number.

It is an amenable number.

4421224021 is a deficient number, since it is larger than the sum of its proper divisors (1087979).

4421224021 is a wasteful number, since it uses less digits than its factorization.

4421224021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087978.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 4421224021 is about 66492.2854247017. The cubic root of 4421224021 is about 1641.2730573587.

Adding to 4421224021 its reverse (1204221244), we get a palindrome (5625445265).

The spelling of 4421224021 in words is "four billion, four hundred twenty-one million, two hundred twenty-four thousand, twenty-one".