21220102202222 has 32 divisors (see below), whose sum is σ = 39706529909760. Its totient is φ = 8262950842080.

The previous prime is 21220102202209. The next prime is 21220102202291. The reversal of 21220102202222 is 22220220102212.

It is a junction number, because it is equal to n+sod(n) for n = 21220102202194 and 21220102202203.

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, 38235638 + ... + 38786649.

It is an arithmetic number, because the mean of its divisors is an integer number (1240829059680).

Almost surely, 2^{21220102202222} is an apocalyptic number.

21220102202222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21220102202222 is a deficient number, since it is larger than the sum of its proper divisors (18486427707538).

21220102202222 is a wasteful number, since it uses less digits than its factorization.

21220102202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77024096.

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

Adding to 21220102202222 its reverse (22220220102212), we get a palindrome (43440322304434).

The spelling of 21220102202222 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, two hundred two thousand, two hundred twenty-two".