111211100112222 has 192 divisors, whose sum is σ = 286628102841600. Its totient is φ = 31692092751360.

The previous prime is 111211100112157. The next prime is 111211100112227. The reversal of 111211100112222 is 222211001112111.

It is a happy number.

111211100112222 is a `hidden beast` number, since 111 + 211 + 10 + 0 + 112 + 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 = 111211100112195 and 111211100112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211100112227) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 210713953 + ... + 211241075.

It is an arithmetic number, because the mean of its divisors is an integer number (1492854702300).

Almost surely, 2^{111211100112222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111211100112222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143314051420800).

111211100112222 is an abundant number, since it is smaller than the sum of its proper divisors (175417002729378).

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

111211100112222 is a wasteful number, since it uses less digits than its factorization.

111211100112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528408 (or 528385 counting only the distinct ones).

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

Adding to 111211100112222 its reverse (222211001112111), we get a palindrome (333422101224333).

The spelling of 111211100112222 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred million, one hundred twelve thousand, two hundred twenty-two".