100112021220 has 96 divisors (see below), whose sum is σ = 287080295040. Its totient is φ = 26053171200.

The previous prime is 100112021201. The next prime is 100112021237. The reversal of 100112021220 is 22120211001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100112021196 and 100112021205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3082426 + ... + 3114734.

It is an arithmetic number, because the mean of its divisors is an integer number (2990419740).

Almost surely, 2^100112021220 is an apocalyptic number.

100112021220 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 100112021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143540147520).

100112021220 is an abundant number, since it is smaller than the sum of its proper divisors (186968273820).

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

100112021220 is a wasteful number, since it uses less digits than its factorization.

100112021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33565 (or 33563 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100112021220 its reverse (22120211001), we get a palindrome (122232232221).

The spelling of 100112021220 in words is "one hundred billion, one hundred twelve million, twenty-one thousand, two hundred twenty".