111220120 has 64 divisors (see below), whose sum is σ = 289072800. Its totient is φ = 38062080.

The previous prime is 111220117. The next prime is 111220127. The reversal of 111220120 is 21022111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 111220097 and 111220106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46 + ... + 14914.

Almost surely, 2^111220120 is an apocalyptic number.

111220120 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 111220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144536400).

111220120 is an abundant number, since it is smaller than the sum of its proper divisors (177852680).

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

111220120 is a wasteful number, since it uses less digits than its factorization.

111220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14908 (or 14904 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 111220120 is about 10546.0950118990. The cubic root of 111220120 is about 480.9070234058.

Adding to 111220120 its reverse (21022111), we get a palindrome (132242231).

The spelling of 111220120 in words is "one hundred eleven million, two hundred twenty thousand, one hundred twenty".