100220021220 has 96 divisors (see below), whose sum is σ = 306564725376. Its totient is φ = 24260992000.

The previous prime is 100220021207. The next prime is 100220021227. The reversal of 100220021220 is 22120022001.

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 = 100220021196 and 100220021205.

It is not an unprimeable number, because it can be changed into a prime (100220021227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354352 + ... + 570968.

It is an arithmetic number, because the mean of its divisors is an integer number (3193382556).

Almost surely, 2^100220021220 is an apocalyptic number.

100220021220 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 100220021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153282362688).

100220021220 is an abundant number, since it is smaller than the sum of its proper divisors (206344704156).

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

100220021220 is a wasteful number, since it uses less digits than its factorization.

100220021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217341 (or 217339 counting only the distinct ones).

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

Adding to 100220021220 its reverse (22120022001), we get a palindrome (122340043221).

The spelling of 100220021220 in words is "one hundred billion, two hundred twenty million, twenty-one thousand, two hundred twenty".