100220012120 has 64 divisors (see below), whose sum is σ = 238068136800. Its totient is φ = 37865318400.

The previous prime is 100220012117. The next prime is 100220012131. The reversal of 100220012120 is 21210022001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60470 + ... + 451770.

Almost surely, 2^100220012120 is an apocalyptic number.

100220012120 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 100220012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119034068400).

100220012120 is an abundant number, since it is smaller than the sum of its proper divisors (137848124680).

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

100220012120 is a wasteful number, since it uses less digits than its factorization.

100220012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391668 (or 391664 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100220012120 its reverse (21210022001), we get a palindrome (121430034121).

The spelling of 100220012120 in words is "one hundred billion, two hundred twenty million, twelve thousand, one hundred twenty".