4224011021 has 2 divisors, whose sum is σ = 4224011022. Its totient is φ = 4224011020.

The previous prime is 4224011009. The next prime is 4224011039. The reversal of 4224011021 is 1201104224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3037552996 + 1186458025 = 55114^2 + 34445^2 .

It is a cyclic number.

It is not a de Polignac number, because 4224011021 - 2⁶ = 4224010957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4224011081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2112005510 + 2112005511.

It is an arithmetic number, because the mean of its divisors is an integer number (2112005511).

Almost surely, 2^4224011021 is an apocalyptic number.

It is an amenable number.

4224011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4224011021 is an equidigital number, since it uses as much as digits as its factorization.

4224011021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 4224011021 is about 64992.3920239900. The cubic root of 4224011021 is about 1616.4974141348.

Adding to 4224011021 its reverse (1201104224), we get a palindrome (5425115245).

The spelling of 4224011021 in words is "four billion, two hundred twenty-four million, eleven thousand, twenty-one".