21222033 has 16 divisors (see below), whose sum is σ = 32403456. Its totient is φ = 12102480.

The previous prime is 21222023. The next prime is 21222037. The reversal of 21222033 is 33022212.

It is not a de Polignac number, because 21222033 - 2⁹ = 21221521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17538 + ... + 18708.

It is an arithmetic number, because the mean of its divisors is an integer number (2025216).

Almost surely, 2^21222033 is an apocalyptic number.

It is an amenable number.

21222033 is a deficient number, since it is larger than the sum of its proper divisors (11181423).

21222033 is a wasteful number, since it uses less digits than its factorization.

21222033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 21222033 is about 4606.7377828568. The cubic root of 21222033 is about 276.8613476309.

Adding to 21222033 its reverse (33022212), we get a palindrome (54244245).

The spelling of 21222033 in words is "twenty-one million, two hundred twenty-two thousand, thirty-three".