21001222202 has 32 divisors (see below), whose sum is σ = 32270555520. Its totient is φ = 10247912640.

The previous prime is 21001222189. The next prime is 21001222219. The reversal of 21001222202 is 20222210012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6224588 + ... + 6227960.

It is an arithmetic number, because the mean of its divisors is an integer number (1008454860).

Almost surely, 2^21001222202 is an apocalyptic number.

21001222202 is a deficient number, since it is larger than the sum of its proper divisors (11269333318).

21001222202 is a wasteful number, since it uses less digits than its factorization.

21001222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21001222202 its reverse (20222210012), we get a palindrome (41223432214).

The spelling of 21001222202 in words is "twenty-one billion, one million, two hundred twenty-two thousand, two hundred two".