111021221200120 has 192 divisors, whose sum is σ = 314065444815360. Its totient is φ = 34574250627840.

The previous prime is 111021221200067. The next prime is 111021221200129. The reversal of 111021221200120 is 21002122120111.

It is a junction number, because it is equal to n+sod(n) for n = 111021221200094 and 111021221200103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021221200129) 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 47 ways as a sum of consecutive naturals, for example, 37993629 + ... + 40811251.

It is an arithmetic number, because the mean of its divisors is an integer number (1635757525080).

Almost surely, 2^{111021221200120} is an apocalyptic number.

111021221200120 is a gapful number since it is divisible by the number (10) 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 111021221200120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157032722407680).

111021221200120 is an abundant number, since it is smaller than the sum of its proper divisors (203044223615240).

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

111021221200120 is a wasteful number, since it uses less digits than its factorization.

111021221200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818826 (or 2818811 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111021221200120 its reverse (21002122120111), we get a palindrome (132023343320231).

The spelling of 111021221200120 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-one million, two hundred thousand, one hundred twenty".