100021112220 has 48 divisors (see below), whose sum is σ = 280270384128. Its totient is φ = 26652175680.

The previous prime is 100021112171. The next prime is 100021112227. The reversal of 100021112220 is 22211120001.

100021112220 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 (12).

It is a junction number, because it is equal to n+sod(n) for n = 100021112196 and 100021112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021112227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 548496 + ... + 707735.

It is an arithmetic number, because the mean of its divisors is an integer number (5838966336).

Almost surely, 2^100021112220 is an apocalyptic number.

100021112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021112220 is an abundant number, since it is smaller than the sum of its proper divisors (180249271908).

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

100021112220 is a wasteful number, since it uses less digits than its factorization.

100021112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257570 (or 1257568 counting only the distinct ones).

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

Adding to 100021112220 its reverse (22211120001), we get a palindrome (122232232221).

The spelling of 100021112220 in words is "one hundred billion, twenty-one million, one hundred twelve thousand, two hundred twenty".