111111100212222 has 64 divisors (see below), whose sum is σ = 273775984715520. Its totient is φ = 33118062645600.

The previous prime is 111111100212137. The next prime is 111111100212227. The reversal of 111111100212222 is 222212001111111.

It is a happy number.

111111100212222 is a `hidden beast` number, since 11 + 111 + 110 + 0 + 212 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111111100212195 and 111111100212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111100212227) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1533207408 + ... + 1533279875.

It is an arithmetic number, because the mean of its divisors is an integer number (4277749761180).

Almost surely, 2^{111111100212222} is an apocalyptic number.

111111100212222 is an abundant number, since it is smaller than the sum of its proper divisors (162664884503298).

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

111111100212222 is a wasteful number, since it uses less digits than its factorization.

111111100212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066487366 (or 3066487360 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111111100212222 its reverse (222212001111111), we get a palindrome (333323101323333).

The spelling of 111111100212222 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred million, two hundred twelve thousand, two hundred twenty-two".