222120212 has 6 divisors (see below), whose sum is σ = 388710378. Its totient is φ = 111060104.

The previous prime is 222120211. The next prime is 222120233. The reversal of 222120212 is 212021222.

It can be written as a sum of positive squares in only one way, i.e., 221533456 + 586756 = 14884^2 + 766^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222120211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27765023 + ... + 27765030.

It is an arithmetic number, because the mean of its divisors is an integer number (64785063).

Almost surely, 2^222120212 is an apocalyptic number.

It is an amenable number.

222120212 is a deficient number, since it is larger than the sum of its proper divisors (166590166).

222120212 is a wasteful number, since it uses less digits than its factorization.

222120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55530057 (or 55530055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 222120212 is about 14903.6979303796. The cubic root of 222120212 is about 605.6141676542.

Adding to 222120212 its reverse (212021222), we get a palindrome (434141434).

It can be divided in two parts, 22 and 2120212, that multiplied together give a palindrome (46644664).

The spelling of 222120212 in words is "two hundred twenty-two million, one hundred twenty thousand, two hundred twelve".