4322421221 has 2 divisors, whose sum is σ = 4322421222. Its totient is φ = 4322421220.

The previous prime is 4322421193. The next prime is 4322421239. The reversal of 4322421221 is 1221242234.

4322421221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4307296900 + 15124321 = 65630^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 4322421221 - 2⁶ = 4322421157 is a prime.

It is a super-2 number, since 2×4322421221² = 37366650423502261682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4322421121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2161210610 + 2161210611.

It is an arithmetic number, because the mean of its divisors is an integer number (2161210611).

Almost surely, 2^4322421221 is an apocalyptic number.

It is an amenable number.

4322421221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4322421221 is an equidigital number, since it uses as much as digits as its factorization.

4322421221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 23.

The square root of 4322421221 is about 65745.1231727495. The cubic root of 4322421221 is about 1628.9547818774.

Adding to 4322421221 its reverse (1221242234), we get a palindrome (5543663455).

The spelling of 4322421221 in words is "four billion, three hundred twenty-two million, four hundred twenty-one thousand, two hundred twenty-one".