4425224021 has 2 divisors, whose sum is σ = 4425224022. Its totient is φ = 4425224020.

The previous prime is 4425224009. The next prime is 4425224059. The reversal of 4425224021 is 1204225244.

4425224021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2298723025 + 2126500996 = 47945^2 + 46114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4425224021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4425224071) 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 as a sum of consecutive naturals, namely, 2212612010 + 2212612011.

It is an arithmetic number, because the mean of its divisors is an integer number (2212612011).

Almost surely, 2^4425224021 is an apocalyptic number.

It is an amenable number.

4425224021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4425224021 is an equidigital number, since it uses as much as digits as its factorization.

4425224021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 4425224021 is about 66522.3573018876. The cubic root of 4425224021 is about 1641.7678760877.

Adding to 4425224021 its reverse (1204225244), we get a palindrome (5629449265).

The spelling of 4425224021 in words is "four billion, four hundred twenty-five million, two hundred twenty-four thousand, twenty-one".