21021122200222 has 16 divisors (see below), whose sum is σ = 32129349153120. Its totient is φ = 10311372833632.

The previous prime is 21021122200189. The next prime is 21021122200229. The reversal of 21021122200222 is 22200222112012.

It is a self number, because there is not a number n which added to its sum of digits gives 21021122200222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021122200229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7166197 + ... + 9664192.

It is an arithmetic number, because the mean of its divisors is an integer number (2008084322070).

Almost surely, 2^{21021122200222} is an apocalyptic number.

21021122200222 is a deficient number, since it is larger than the sum of its proper divisors (11108226952898).

21021122200222 is a wasteful number, since it uses less digits than its factorization.

21021122200222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16842227.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21021122200222 its reverse (22200222112012), we get a palindrome (43221344312234).

The spelling of 21021122200222 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-two million, two hundred thousand, two hundred twenty-two".