100111331220 has 96 divisors (see below), whose sum is σ = 284467075200. Its totient is φ = 26303353344.

The previous prime is 100111331213. The next prime is 100111331237. The reversal of 100111331220 is 22133111001.

It is a happy number.

100111331220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 100111331220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1127902 + ... + 1213418.

It is an arithmetic number, because the mean of its divisors is an integer number (2963198700).

Almost surely, 2^100111331220 is an apocalyptic number.

100111331220 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 100111331220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142233537600).

100111331220 is an abundant number, since it is smaller than the sum of its proper divisors (184355743980).

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

100111331220 is a wasteful number, since it uses less digits than its factorization.

100111331220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85817 (or 85815 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 100111331220 its reverse (22133111001), we get a palindrome (122244442221).

The spelling of 100111331220 in words is "one hundred billion, one hundred eleven million, three hundred thirty-one thousand, two hundred twenty".