111111112222222 has 32 divisors (see below), whose sum is σ = 190628781120000. Its totient is φ = 47580912419040.

The previous prime is 111111112222217. The next prime is 111111112222237. The reversal of 111111112222222 is 222222211111111.

It is a super-2 number, since 2×111111112222222² (a number of 29 digits) contains 22 as substring.

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

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 111111112222193 and 111111112222202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116190472 + ... + 117142852.

It is an arithmetic number, because the mean of its divisors is an integer number (5957149410000).

Almost surely, 2^{111111112222222} is an apocalyptic number.

111111112222222 is the 6666667-th heptagonal number.

111111112222222 is a deficient number, since it is larger than the sum of its proper divisors (79517668897778).

111111112222222 is a wasteful number, since it uses less digits than its factorization.

111111112222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959056.

The product of its digits is 128, while the sum is 22.

Adding to 111111112222222 its reverse (222222211111111), we get a palindrome (333333323333333).

The spelling of 111111112222222 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twenty-two".