4331221009 has 2 divisors, whose sum is σ = 4331221010. Its totient is φ = 4331221008.

The previous prime is 4331220997. The next prime is 4331221067. The reversal of 4331221009 is 9001221334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4199040000 + 132181009 = 64800^2 + 11497^2 .

It is a cyclic number.

It is not a de Polignac number, because 4331221009 - 2¹¹ = 4331218961 is a prime.

It is not a weakly prime, because it can be changed into another prime (4331227009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2165610504 + 2165610505.

It is an arithmetic number, because the mean of its divisors is an integer number (2165610505).

Almost surely, 2^4331221009 is an apocalyptic number.

It is an amenable number.

4331221009 is a deficient number, since it is larger than the sum of its proper divisors (1).

4331221009 is an equidigital number, since it uses as much as digits as its factorization.

4331221009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 4331221009 is about 65812.0126496675. The cubic root of 4331221009 is about 1630.0594667604.

The spelling of 4331221009 in words is "four billion, three hundred thirty-one million, two hundred twenty-one thousand, nine".