111221100220 has 48 divisors (see below), whose sum is σ = 247331780640. Its totient is φ = 41866665984.

The previous prime is 111221100163. The next prime is 111221100227. The reversal of 111221100220 is 22001122111.

111221100220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 111221100220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221100227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4655947 + ... + 4679773.

It is an arithmetic number, because the mean of its divisors is an integer number (5152745430).

Almost surely, 2^111221100220 is an apocalyptic number.

111221100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221100220 is an abundant number, since it is smaller than the sum of its proper divisors (136110680420).

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

111221100220 is a wasteful number, since it uses less digits than its factorization.

111221100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37582 (or 37580 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111221100220 its reverse (22001122111), we get a palindrome (133222222331).

The spelling of 111221100220 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred thousand, two hundred twenty".