21222203222 has 16 divisors (see below), whose sum is σ = 34730603712. Its totient is φ = 9645522120.

The previous prime is 21222203221. The next prime is 21222203239. The reversal of 21222203222 is 22230222212.

It is a junction number, because it is equal to n+sod(n) for n = 21222203194 and 21222203203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222203221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 219413 + ... + 300975.

It is an arithmetic number, because the mean of its divisors is an integer number (2170662732).

Almost surely, 2^21222203222 is an apocalyptic number.

21222203222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21222203222 is a deficient number, since it is larger than the sum of its proper divisors (13508400490).

21222203222 is a wasteful number, since it uses less digits than its factorization.

21222203222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93403.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21222203222 its reverse (22230222212), we get a palindrome (43452425434).

The spelling of 21222203222 in words is "twenty-one billion, two hundred twenty-two million, two hundred three thousand, two hundred twenty-two".