21211222102210 has 64 divisors (see below), whose sum is σ = 43859766988800. Its totient is φ = 7234886831040.

The previous prime is 21211222102199. The next prime is 21211222102223. The reversal of 21211222102210 is 1220122211212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105865425 + ... + 106065595.

It is an arithmetic number, because the mean of its divisors is an integer number (685308859200).

Almost surely, 2^{21211222102210} is an apocalyptic number.

21211222102210 is an abundant number, since it is smaller than the sum of its proper divisors (22648544886590).

21211222102210 is a wasteful number, since it uses less digits than its factorization.

21211222102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207991.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21211222102210 its reverse (1220122211212), we get a palindrome (22431344313422).

The spelling of 21211222102210 in words is "twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred two thousand, two hundred ten".