4421044021 has 8 divisors (see below), whose sum is σ = 4700533464. Its totient is φ = 4143713280.

The previous prime is 4421044009. The next prime is 4421044027. The reversal of 4421044021 is 1204401244.

It can be written as a sum of positive squares in 4 ways, for example, as 361570225 + 4059473796 = 19015^2 + 63714^2 .

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

It is not a de Polignac number, because 4421044021 - 2¹¹ = 4421041973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4421043983 and 4421044001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421044027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535450 + ... + 543643.

It is an arithmetic number, because the mean of its divisors is an integer number (587566683).

Almost surely, 2^4421044021 is an apocalyptic number.

It is an amenable number.

4421044021 is a deficient number, since it is larger than the sum of its proper divisors (279489443).

4421044021 is a wasteful number, since it uses less digits than its factorization.

4421044021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079351.

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

The square root of 4421044021 is about 66490.9318704438. The cubic root of 4421044021 is about 1641.2507834998.

Adding to 4421044021 its reverse (1204401244), we get a palindrome (5625445265).

The spelling of 4421044021 in words is "four billion, four hundred twenty-one million, forty-four thousand, twenty-one".