222111012 has 24 divisors (see below), whose sum is σ = 519129856. Its totient is φ = 73912608.

The previous prime is 222111011. The next prime is 222111017. The reversal of 222111012 is 210111222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (222111011) 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, 7963 + ... + 22530.

Almost surely, 2^222111012 is an apocalyptic number.

It is an amenable number.

222111012 is an abundant number, since it is smaller than the sum of its proper divisors (297018844).

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

222111012 is a wasteful number, since it uses less digits than its factorization.

222111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31107 (or 31105 counting only the distinct ones).

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

The square root of 222111012 is about 14903.3892789526. The cubic root of 222111012 is about 605.6058062250.

Adding to 222111012 its reverse (210111222), we get a palindrome (432222234).

The spelling of 222111012 in words is "two hundred twenty-two million, one hundred eleven thousand, twelve".