221112222112 has 12 divisors (see below), whose sum is σ = 435314687346. Its totient is φ = 110556111040.

The previous prime is 221112222017. The next prime is 221112222119. The reversal of 221112222112 is 211222211122.

It can be written as a sum of positive squares in only one way, i.e., 174319610256 + 46792611856 = 417516^2 + 216316^2 .

It is a super-2 number, since 2×221112222112² (a number of 23 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221112222112.

It is not an unprimeable number, because it can be changed into a prime (221112222119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3454878439 + ... + 3454878502.

Almost surely, 2^221112222112 is an apocalyptic number.

It is an amenable number.

221112222112 is a deficient number, since it is larger than the sum of its proper divisors (214202465234).

221112222112 is an equidigital number, since it uses as much as digits as its factorization.

221112222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6909756951 (or 6909756943 counting only the distinct ones).

The product of its digits is 128, while the sum is 19.

Adding to 221112222112 its reverse (211222211122), we get a palindrome (432334433234).

The spelling of 221112222112 in words is "two hundred twenty-one billion, one hundred twelve million, two hundred twenty-two thousand, one hundred twelve".