Adding to 12218622 its reverse (22681221), we get a palindrome (34899843).
It is a congruent number.
Almost surely, 212218622 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12218622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13468224).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12218622 is a wasteful number, since it uses less digits than its factorization.
12218622 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3704.
The square root of 12218622 is about 3495.5145543968. The cubic root of 12218622 is about 230.3248214526.
The spelling of 12218622 in words is "twelve million, two hundred eighteen thousand, six hundred twenty-two".