21220200212222 has 16 divisors (see below), whose sum is σ = 34989032415744. Its totient is φ = 9571915431000.

The previous prime is 21220200212179. The next prime is 21220200212327. The reversal of 21220200212222 is 22221200202212.

It is a super-2 number, since 2×21220200212222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21220200212194 and 21220200212203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3681503054 + ... + 3681508817.

It is an arithmetic number, because the mean of its divisors is an integer number (2186814525984).

Almost surely, 2^{21220200212222} is an apocalyptic number.

21220200212222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21220200212222 is a deficient number, since it is larger than the sum of its proper divisors (13768832203522).

21220200212222 is a wasteful number, since it uses less digits than its factorization.

21220200212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7363012015.

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

Adding to 21220200212222 its reverse (22221200202212), we get a palindrome (43441400414434).

The spelling of 21220200212222 in words is "twenty-one trillion, two hundred twenty billion, two hundred million, two hundred twelve thousand, two hundred twenty-two".