111213220 has 24 divisors (see below), whose sum is σ = 235819584. Its totient is φ = 44052576.

The previous prime is 111213217. The next prime is 111213227. The reversal of 111213220 is 22312111.

It is a self number, because there is not a number n which added to its sum of digits gives 111213220.

It is not an unprimeable number, because it can be changed into a prime (111213227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24934 + ... + 29053.

It is an arithmetic number, because the mean of its divisors is an integer number (9825816).

Almost surely, 2^111213220 is an apocalyptic number.

111213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111213220 is an abundant number, since it is smaller than the sum of its proper divisors (124606364).

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

111213220 is a wasteful number, since it uses less digits than its factorization.

111213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54099 (or 54097 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 111213220 is about 10545.7678715208. The cubic root of 111213220 is about 480.8970781816.

Adding to 111213220 its reverse (22312111), we get a palindrome (133525331).

It can be divided in two parts, 11121 and 3220, that added together give a palindrome (14341).

The spelling of 111213220 in words is "one hundred eleven million, two hundred thirteen thousand, two hundred twenty".