111021221120 has 72 divisors (see below), whose sum is σ = 266626031616. Its totient is φ = 44292343808.

The previous prime is 111021221089. The next prime is 111021221123. The reversal of 111021221120 is 21122120111.

It is a junction number, because it is equal to n+sod(n) for n = 111021221095 and 111021221104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021221123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377009 + ... + 603471.

It is an arithmetic number, because the mean of its divisors is an integer number (3703139328).

Almost surely, 2^111021221120 is an apocalyptic number.

111021221120 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 111021221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133313015808).

111021221120 is an abundant number, since it is smaller than the sum of its proper divisors (155604810496).

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

111021221120 is an equidigital number, since it uses as much as digits as its factorization.

111021221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226867 (or 226853 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111021221120 its reverse (21122120111), we get a palindrome (132143341231).

The spelling of 111021221120 in words is "one hundred eleven billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty".