22211222 is nontrivially palindromic in base 10.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a nude number because it is divisible by every one of its digits.
It is a zygodrome in base 10.
It is a congruent number.
It is an unprimeable number.
Almost surely, 222211222 is an apocalyptic number.
22211222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
22211222 is a wasteful number, since it uses less digits than its factorization.
22211222 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1009614.
The square root of 22211222 is about 4712.8783137272. The cubic root of 22211222 is about 281.0978243769.
The spelling of 22211222 in words is "twenty-two million, two hundred eleven thousand, two hundred twenty-two".