100021220220 has 24 divisors (see below), whose sum is σ = 280059416784. Its totient is φ = 26672325376.

The previous prime is 100021220191. The next prime is 100021220263. The reversal of 100021220220 is 22022120001.

100021220220 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 = 100021220196 and 100021220205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833510109 + ... + 833510228.

It is an arithmetic number, because the mean of its divisors is an integer number (11669142366).

Almost surely, 2^100021220220 is an apocalyptic number.

100021220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021220220 is an abundant number, since it is smaller than the sum of its proper divisors (180038196564).

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

100021220220 is a wasteful number, since it uses less digits than its factorization.

100021220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667020349 (or 1667020347 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 100021220220 its reverse (22022120001), we get a palindrome (122043340221).

The spelling of 100021220220 in words is "one hundred billion, twenty-one million, two hundred twenty thousand, two hundred twenty".