12022222 has 4 divisors (see below), whose sum is σ = 18033336. Its totient is φ = 6011110.

The previous prime is 12022181. The next prime is 12022223. The reversal of 12022222 is 22222021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22222021 = 97 ⋅229093.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

12022222 is a modest number, since divided by 2222 gives 1202 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005554 + ... + 3005557.

It is an arithmetic number, because the mean of its divisors is an integer number (4508334).

Almost surely, 2^12022222 is an apocalyptic number.

12022222 is a deficient number, since it is larger than the sum of its proper divisors (6011114).

12022222 is an equidigital number, since it uses as much as digits as its factorization.

12022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6011113.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 12022222 is about 3467.3076010069. The cubic root of 12022222 is about 229.0840826986.

Adding to 12022222 its reverse (22222021), we get a palindrome (34244243).

The spelling of 12022222 in words is "twelve million, twenty-two thousand, two hundred twenty-two".