21222202 has 8 divisors (see below), whose sum is σ = 33508800. Its totient is φ = 10052604.

The previous prime is 21222181. The next prime is 21222211. The reversal of 21222202 is 20222212.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 279202 + ... + 279277.

It is an arithmetic number, because the mean of its divisors is an integer number (4188600).

Almost surely, 2^21222202 is an apocalyptic number.

21222202 is a deficient number, since it is larger than the sum of its proper divisors (12286598).

21222202 is a wasteful number, since it uses less digits than its factorization.

21222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558500.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 21222202 is about 4606.7561255183. The cubic root of 21222202 is about 276.8620825502.

Adding to 21222202 its reverse (20222212), we get a palindrome (41444414).

The spelling of 21222202 in words is "twenty-one million, two hundred twenty-two thousand, two hundred two".