9107221 has 2 divisors, whose sum is σ = 9107222. Its totient is φ = 9107220.

The previous prime is 9107209. The next prime is 9107269. The reversal of 9107221 is 1227019.

9107221 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., 7700625 + 1406596 = 2775^2 + 1186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9107221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9107192 and 9107201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9107321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4553610 + 4553611.

It is an arithmetic number, because the mean of its divisors is an integer number (4553611).

Almost surely, 2^9107221 is an apocalyptic number.

It is an amenable number.

9107221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9107221 is an equidigital number, since it uses as much as digits as its factorization.

9107221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 9107221 is about 3017.8172575555. The cubic root of 9107221 is about 208.8311556515.

The spelling of 9107221 in words is "nine million, one hundred seven thousand, two hundred twenty-one".