12222212 has 12 divisors (see below), whose sum is σ = 21601356. Its totient is φ = 6050400.

The previous prime is 12222211. The next prime is 12222241. The reversal of 12222212 is 21222221.

It can be written as a sum of positive squares in 2 ways, for example, as 11723776 + 498436 = 3424^2 + 706^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12222211) 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 in 3 ways as a sum of consecutive naturals, for example, 14723 + ... + 15530.

It is an arithmetic number, because the mean of its divisors is an integer number (1800113).

Almost surely, 2^12222212 is an apocalyptic number.

It is an amenable number.

12222212 is a deficient number, since it is larger than the sum of its proper divisors (9379144).

12222212 is a wasteful number, since it uses less digits than its factorization.

12222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30358 (or 30356 counting only the distinct ones).

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

The square root of 12222212 is about 3496.0280319242. The cubic root of 12222212 is about 230.3473767823.

Adding to 12222212 its reverse (21222221), we get a palindrome (33444433).

Subtracting 12222212 from its reverse (21222221), we obtain a palindrome (9000009).

It can be divided in two parts, 1222221 and 2, that multiplied together give a palindrome (2444442).

The spelling of 12222212 in words is "twelve million, two hundred twenty-two thousand, two hundred twelve".