222211312 has 20 divisors (see below), whose sum is σ = 434800296. Its totient is φ = 110004800.

The previous prime is 222211309. The next prime is 222211321. The reversal of 222211312 is 213112222.

It is a happy number.

It is a super-2 number, since 2×222211312² = 98755734361522688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67138 + ... + 70369.

Almost surely, 2^222211312 is an apocalyptic number.

It is an amenable number.

222211312 is a deficient number, since it is larger than the sum of its proper divisors (212588984).

222211312 is a wasteful number, since it uses less digits than its factorization.

222211312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137616 (or 137610 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 222211312 is about 14906.7539055289. The cubic root of 222211312 is about 605.6969515204.

Adding to 222211312 its reverse (213112222), we get a palindrome (435323534).

The spelling of 222211312 in words is "two hundred twenty-two million, two hundred eleven thousand, three hundred twelve".