4023222221 has 2 divisors, whose sum is σ = 4023222222. Its totient is φ = 4023222220.

The previous prime is 4023222197. The next prime is 4023222233. The reversal of 4023222221 is 1222223204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2133146596 + 1890075625 = 46186^2 + 43475^2 .

It is a cyclic number.

It is not a de Polignac number, because 4023222221 - 2⁶ = 4023222157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4023222193 and 4023222202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4023222271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2011611110 + 2011611111.

It is an arithmetic number, because the mean of its divisors is an integer number (2011611111).

Almost surely, 2^4023222221 is an apocalyptic number.

It is an amenable number.

4023222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4023222221 is an equidigital number, since it uses as much as digits as its factorization.

4023222221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4023222221 is about 63428.8752935128. The cubic root of 4023222221 is about 1590.4670411811.

Adding to 4023222221 its reverse (1222223204), we get a palindrome (5245445425).

The spelling of 4023222221 in words is "four billion, twenty-three million, two hundred twenty-two thousand, two hundred twenty-one".