4421024221 has 2 divisors, whose sum is σ = 4421024222. Its totient is φ = 4421024220.

The previous prime is 4421024213. The next prime is 4421024239. The reversal of 4421024221 is 1224201244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2602428196 + 1818596025 = 51014^2 + 42645^2 .

It is a cyclic number.

It is not a de Polignac number, because 4421024221 - 2³ = 4421024213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4421024192 and 4421024201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4421024021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2210512110 + 2210512111.

It is an arithmetic number, because the mean of its divisors is an integer number (2210512111).

Almost surely, 2^4421024221 is an apocalyptic number.

It is an amenable number.

4421024221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4421024221 is an equidigital number, since it uses as much as digits as its factorization.

4421024221 is an evil number, because the sum of its binary digits is even.

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

The square root of 4421024221 is about 66490.7829777932. The cubic root of 4421024221 is about 1641.2483333384.

Adding to 4421024221 its reverse (1224201244), we get a palindrome (5645225465).

The spelling of 4421024221 in words is "four billion, four hundred twenty-one million, twenty-four thousand, two hundred twenty-one".