100120221820 has 24 divisors (see below), whose sum is σ = 212913892800. Its totient is φ = 39541150272.

The previous prime is 100120221811. The next prime is 100120221853. The reversal of 100120221820 is 28122021001.

100120221820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×100120221820² (a number of 23 digits) contains 22 as substring.

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, 31682035 + ... + 31685194.

It is an arithmetic number, because the mean of its divisors is an integer number (8871412200).

Almost surely, 2^100120221820 is an apocalyptic number.

100120221820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100120221820 is an abundant number, since it is smaller than the sum of its proper divisors (112793670980).

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

100120221820 is a wasteful number, since it uses less digits than its factorization.

100120221820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63367317 (or 63367315 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 100120221820 its reverse (28122021001), we get a palindrome (128242242821).

The spelling of 100120221820 in words is "one hundred billion, one hundred twenty million, two hundred twenty-one thousand, eight hundred twenty".