222212212 has 6 divisors (see below), whose sum is σ = 388871378. Its totient is φ = 111106104.

The previous prime is 222212209. The next prime is 222212233. The reversal of 222212212 is 212212222.

It can be written as a sum of positive squares in only one way, i.e., 218921616 + 3290596 = 14796^2 + 1814^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27776523 + ... + 27776530.

Almost surely, 2^222212212 is an apocalyptic number.

It is an amenable number.

222212212 is a deficient number, since it is larger than the sum of its proper divisors (166659166).

222212212 is a wasteful number, since it uses less digits than its factorization.

222212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55553057 (or 55553055 counting only the distinct ones).

The product of its digits is 128, while the sum is 16.

The square root of 222212212 is about 14906.7840931570. The cubic root of 222212212 is about 605.6977692503.

Adding to 222212212 its reverse (212212222), we get a palindrome (434424434).

The spelling of 222212212 in words is "two hundred twenty-two million, two hundred twelve thousand, two hundred twelve".