21222111110210 has 32 divisors (see below), whose sum is σ = 38320804468800. Its totient is φ = 8461969230528.

The previous prime is 21222111110209. The next prime is 21222111110231. The reversal of 21222111110210 is 1201111122212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10682309 + ... + 12512231.

It is an arithmetic number, because the mean of its divisors is an integer number (1197525139650).

Almost surely, 2^{21222111110210} is an apocalyptic number.

21222111110210 is a deficient number, since it is larger than the sum of its proper divisors (17098693358590).

21222111110210 is a wasteful number, since it uses less digits than its factorization.

21222111110210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833602.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21222111110210 its reverse (1201111122212), we get a palindrome (22423222232422).

The spelling of 21222111110210 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred eleven million, one hundred ten thousand, two hundred ten".