222111212 has 6 divisors (see below), whose sum is σ = 388694628. Its totient is φ = 111055604.

The previous prime is 222111209. The next prime is 222111233. The reversal of 222111212 is 212111222.

It is a super-2 number, since 2×222111212² = 98666780992217888, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27763898 + ... + 27763905.

It is an arithmetic number, because the mean of its divisors is an integer number (64782438).

Almost surely, 2^222111212 is an apocalyptic number.

It is an amenable number.

222111212 is a deficient number, since it is larger than the sum of its proper divisors (166583416).

222111212 is a wasteful number, since it uses less digits than its factorization.

222111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55527807 (or 55527805 counting only the distinct ones).

The product of its digits is 32, while the sum is 14.

The square root of 222111212 is about 14903.3959888342. The cubic root of 222111212 is about 605.6059879977.

Adding to 222111212 its reverse (212111222), we get a palindrome (434222434).

The spelling of 222111212 in words is "two hundred twenty-two million, one hundred eleven thousand, two hundred twelve".