21220202222 has 8 divisors (see below), whose sum is σ = 32430875256. Its totient is φ = 10409910472.

The previous prime is 21220202203. The next prime is 21220202233. The reversal of 21220202222 is 22220202212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×21220202222³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21220202222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100095188 + ... + 100095399.

It is an arithmetic number, because the mean of its divisors is an integer number (4053859407).

Almost surely, 2^21220202222 is an apocalyptic number.

21220202222 is a deficient number, since it is larger than the sum of its proper divisors (11210673034).

21220202222 is a wasteful number, since it uses less digits than its factorization.

21220202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200190642.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 21220202222 its reverse (22220202212), we get a palindrome (43440404434).

The spelling of 21220202222 in words is "twenty-one billion, two hundred twenty million, two hundred two thousand, two hundred twenty-two".