21010202222222 has 16 divisors (see below), whose sum is σ = 33377873435712. Its totient is φ = 9884567696640.

The previous prime is 21010202222213. The next prime is 21010202222279. The reversal of 21010202222222 is 22222220201012.

21010202222222 is a modest number, since divided by 2222222 gives 2101020 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 21010202222194 and 21010202222203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80689679 + ... + 80949642.

It is an arithmetic number, because the mean of its divisors is an integer number (2086117089732).

Almost surely, 2^{21010202222222} is an apocalyptic number.

21010202222222 is a deficient number, since it is larger than the sum of its proper divisors (12367671213490).

21010202222222 is a wasteful number, since it uses less digits than its factorization.

21010202222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161643163.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21010202222222 its reverse (22222220201012), we get a palindrome (43232422423234).

The spelling of 21010202222222 in words is "twenty-one trillion, ten billion, two hundred two million, two hundred twenty-two thousand, two hundred twenty-two".