10213221 has 16 divisors (see below), whose sum is σ = 14139648. Its totient is φ = 6552000.

The previous prime is 10213207. The next prime is 10213253. The reversal of 10213221 is 12231201.

It is not a de Polignac number, because 10213221 - 2⁶ = 10213157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10213197 and 10213206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10213261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10756 + ... + 11666.

It is an arithmetic number, because the mean of its divisors is an integer number (883728).

Almost surely, 2^10213221 is an apocalyptic number.

It is an amenable number.

10213221 is a deficient number, since it is larger than the sum of its proper divisors (3926427).

10213221 is a wasteful number, since it uses less digits than its factorization.

10213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 10213221 is about 3195.8130420912. The cubic root of 10213221 is about 216.9639487916.

Adding to 10213221 its reverse (12231201), we get a palindrome (22444422).

The spelling of 10213221 in words is "ten million, two hundred thirteen thousand, two hundred twenty-one".