It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a congruent number.
It is an unprimeable number.
Almost surely, 2121012222 is an apocalyptic number.
121012222 is a wasteful number, since it uses less digits than its factorization.
121012222 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3559202.
The square root of 121012222 is about 11000.5555314266. Note that the first 4 decimals coincide. The cubic root of 121012222 is about 494.6253969545.
Adding to 121012222 its reverse (222210121), we get a palindrome (343222343).
The spelling of 121012222 in words is "one hundred twenty-one million, twelve thousand, two hundred twenty-two".