111222121120 has 192 divisors, whose sum is σ = 290558016000. Its totient is φ = 39896064000.

The previous prime is 111222121081. The next prime is 111222121133. The reversal of 111222121120 is 21121222111.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 111222121094 and 111222121103.

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, 55637881 + ... + 55639879.

It is an arithmetic number, because the mean of its divisors is an integer number (1513323000).

Almost surely, 2^111222121120 is an apocalyptic number.

111222121120 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 111222121120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145279008000).

111222121120 is an abundant number, since it is smaller than the sum of its proper divisors (179335894880).

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

111222121120 is a wasteful number, since it uses less digits than its factorization.

111222121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439 (or 2431 counting only the distinct ones).

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

Adding to 111222121120 its reverse (21121222111), we get a palindrome (132343343231).

The spelling of 111222121120 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty".