21220220222222 has 32 divisors (see below), whose sum is σ = 38552295555072. Its totient is φ = 8551656330624.

The previous prime is 21220220222197. The next prime is 21220220222237. The reversal of 21220220222222 is 22222202202212.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 40154798 + ... + 40679825.

It is an arithmetic number, because the mean of its divisors is an integer number (1204759236096).

Almost surely, 2^{21220220222222} is an apocalyptic number.

21220220222222 is a deficient number, since it is larger than the sum of its proper divisors (17332075332850).

21220220222222 is a wasteful number, since it uses less digits than its factorization.

21220220222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80835752.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 21220220222222 its reverse (22222202202212), we get a palindrome (43442422424434).

The spelling of 21220220222222 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twenty-two".