111222220 has 24 divisors (see below), whose sum is σ = 235754064. Its totient is φ = 44072256.

The previous prime is 111222193. The next prime is 111222229. The reversal of 111222220 is 22222111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 111222220.

It is not an unprimeable number, because it can be changed into a prime (111222229) 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, 23847 + ... + 28126.

It is an arithmetic number, because the mean of its divisors is an integer number (9823086).

Almost surely, 2^111222220 is an apocalyptic number.

111222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222220 is an abundant number, since it is smaller than the sum of its proper divisors (124531844).

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

111222220 is a wasteful number, since it uses less digits than its factorization.

111222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52089 (or 52087 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 111222220 is about 10546.1945743477. The cubic root of 111222220 is about 480.9100501315.

Adding to 111222220 its reverse (22222111), we get a palindrome (133444331).

It can be divided in two parts, 1112 and 22220, that added together give a palindrome (23332).

The spelling of 111222220 in words is "one hundred eleven million, two hundred twenty-two thousand, two hundred twenty".