111022111228 has 72 divisors (see below), whose sum is σ = 240578326800. Its totient is φ = 44570034432.

The previous prime is 111022111183. The next prime is 111022111229. The reversal of 111022111228 is 822111220111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111022111199 and 111022111208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111022111229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163950 + ... + 498922.

It is an arithmetic number, because the mean of its divisors is an integer number (3341365650).

Almost surely, 2^111022111228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111022111228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120289163400).

111022111228 is an abundant number, since it is smaller than the sum of its proper divisors (129556215572).

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

111022111228 is a wasteful number, since it uses less digits than its factorization.

111022111228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335099 (or 335090 counting only the distinct ones).

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

Adding to 111022111228 its reverse (822111220111), we get a palindrome (933133331339).

The spelling of 111022111228 in words is "one hundred eleven billion, twenty-two million, one hundred eleven thousand, two hundred twenty-eight".