21222102122222 has 32 divisors (see below), whose sum is σ = 34354818424800. Its totient is φ = 9794682247168.

The previous prime is 21222102122153. The next prime is 21222102122231. The reversal of 21222102122222 is 22222120122212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2444429 + ... + 6958407.

It is an arithmetic number, because the mean of its divisors is an integer number (1073588075775).

Almost surely, 2^{21222102122222} is an apocalyptic number.

21222102122222 is a deficient number, since it is larger than the sum of its proper divisors (13132716302578).

21222102122222 is a wasteful number, since it uses less digits than its factorization.

21222102122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516660.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21222102122222 its reverse (22222120122212), we get a palindrome (43444222244434).

The spelling of 21222102122222 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred two million, one hundred twenty-two thousand, two hundred twenty-two".