111404220 has 96 divisors (see below), whose sum is σ = 332774400. Its totient is φ = 27765504.

The previous prime is 111404219. The next prime is 111404221. The reversal of 111404220 is 22404111.

It is an interprime number because it is at equal distance from previous prime (111404219) and next prime (111404221).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111404220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111404221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89442 + ... + 90678.

It is an arithmetic number, because the mean of its divisors is an integer number (3466400).

Almost surely, 2^111404220 is an apocalyptic number.

111404220 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 111404220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166387200).

111404220 is an abundant number, since it is smaller than the sum of its proper divisors (221370180).

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

111404220 is a wasteful number, since it uses less digits than its factorization.

111404220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 111404220 is about 10554.8197521322. The cubic root of 111404220 is about 481.1722217588.

Adding to 111404220 its reverse (22404111), we get a palindrome (133808331).

The spelling of 111404220 in words is "one hundred eleven million, four hundred four thousand, two hundred twenty".