111221021112 has 128 divisors (see below), whose sum is σ = 288493470720. Its totient is φ = 35707392000.

The previous prime is 111221021081. The next prime is 111221021137. The reversal of 111221021112 is 211120122111.

It is a happy number.

111221021112 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 111221021091 and 111221021100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30131187 + ... + 30134877.

It is an arithmetic number, because the mean of its divisors is an integer number (2253855240).

Almost surely, 2^111221021112 is an apocalyptic number.

111221021112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111221021112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144246735360).

111221021112 is an abundant number, since it is smaller than the sum of its proper divisors (177272449608).

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

111221021112 is a wasteful number, since it uses less digits than its factorization.

111221021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125 (or 4121 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111221021112 its reverse (211120122111), we get a palindrome (322341143223).

The spelling of 111221021112 in words is "one hundred eleven billion, two hundred twenty-one million, twenty-one thousand, one hundred twelve".