12111222 has 16 divisors (see below), whose sum is σ = 24303600. Its totient is φ = 4023552.

The previous prime is 12111221. The next prime is 12111263. The reversal of 12111222 is 22211121.

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

It is a junction number, because it is equal to n+sod(n) for n = 12111198 and 12111207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1347 + ... + 5102.

It is an arithmetic number, because the mean of its divisors is an integer number (1518975).

Almost surely, 2^12111222 is an apocalyptic number.

12111222 is an abundant number, since it is smaller than the sum of its proper divisors (12192378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12111222 is a wasteful number, since it uses less digits than its factorization.

12111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6767.

The product of its digits is 16, while the sum is 12.

The square root of 12111222 is about 3480.1181014443. The cubic root of 12111222 is about 229.6479933625.

Adding to 12111222 its reverse (22211121), we get a palindrome (34322343).

The spelling of 12111222 in words is "twelve million, one hundred eleven thousand, two hundred twenty-two".