9221021 has 8 divisors (see below), whose sum is σ = 9792000. Its totient is φ = 8653248.

The previous prime is 9221011. The next prime is 9221027. The reversal of 9221021 is 1201229.

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 9221021 - 2⁶ = 9220957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9221027) 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 in 7 ways as a sum of consecutive naturals, for example, 7940 + ... + 9026.

It is an arithmetic number, because the mean of its divisors is an integer number (1224000).

Almost surely, 2^9221021 is an apocalyptic number.

It is an amenable number.

9221021 is a deficient number, since it is larger than the sum of its proper divisors (570979).

9221021 is a wasteful number, since it uses less digits than its factorization.

9221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 9221021 is about 3036.6134097050. The cubic root of 9221021 is about 209.6973796894.

The spelling of 9221021 in words is "nine million, two hundred twenty-one thousand, twenty-one".