10331221 has 8 divisors (see below), whose sum is σ = 10949400. Its totient is φ = 9730560.

The previous prime is 10331219. The next prime is 10331227. The reversal of 10331221 is 12213301.

10331221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1240996 + 9090225 = 1114^2 + 3015^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10331221 - 2¹ = 10331219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10331227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3156 + ... + 5533.

It is an arithmetic number, because the mean of its divisors is an integer number (1368675).

Almost surely, 2^10331221 is an apocalyptic number.

It is an amenable number.

10331221 is a deficient number, since it is larger than the sum of its proper divisors (618179).

10331221 is an equidigital number, since it uses as much as digits as its factorization.

10331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8759.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 10331221 is about 3214.2216787272. The cubic root of 10331221 is about 217.7963266186.

Adding to 10331221 its reverse (12213301), we get a palindrome (22544522).

The spelling of 10331221 in words is "ten million, three hundred thirty-one thousand, two hundred twenty-one".