111320220 has 96 divisors (see below), whose sum is σ = 342590976. Its totient is φ = 26784000.

The previous prime is 111320203. The next prime is 111320239. The reversal of 111320220 is 22023111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111320196 and 111320205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99102 + ... + 100218.

It is an arithmetic number, because the mean of its divisors is an integer number (3568656).

Almost surely, 2^111320220 is an apocalyptic number.

111320220 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 111320220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171295488).

111320220 is an abundant number, since it is smaller than the sum of its proper divisors (231270756).

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

111320220 is a wasteful number, since it uses less digits than its factorization.

111320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1289 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 111320220 is about 10550.8397770035. The cubic root of 111320220 is about 481.0512549782.

Adding to 111320220 its reverse (22023111), we get a palindrome (133343331).

It can be divided in two parts, 11 and 1320220, that added together give a palindrome (1320231).

The spelling of 111320220 in words is "one hundred eleven million, three hundred twenty thousand, two hundred twenty".