222111312 has 40 divisors (see below), whose sum is σ = 574978080. Its totient is φ = 73883520.

The previous prime is 222111293. The next prime is 222111313. The reversal of 222111312 is 213111222.

It is a super-2 number, since 2×222111312² = 98666869836722688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 222111291 and 222111300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222111313) 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 7 ways as a sum of consecutive naturals, for example, 19887 + ... + 28977.

It is an arithmetic number, because the mean of its divisors is an integer number (14374452).

Almost surely, 2^222111312 is an apocalyptic number.

It is an amenable number.

222111312 is an abundant number, since it is smaller than the sum of its proper divisors (352866768).

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

222111312 is a wasteful number, since it uses less digits than its factorization.

222111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9611 (or 9605 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 222111312 is about 14903.3993437739. The cubic root of 222111312 is about 605.6060788839.

Adding to 222111312 its reverse (213111222), we get a palindrome (435222534).

The spelling of 222111312 in words is "two hundred twenty-two million, one hundred eleven thousand, three hundred twelve".