100011212220 has 96 divisors (see below), whose sum is σ = 286450311168. Its totient is φ = 26064605952.

The previous prime is 100011212201. The next prime is 100011212243. The reversal of 100011212220 is 22212110001.

100011212220 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 = 100011212196 and 100011212205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 412594 + ... + 608486.

It is an arithmetic number, because the mean of its divisors is an integer number (2983857408).

Almost surely, 2^100011212220 is an apocalyptic number.

100011212220 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 100011212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143225155584).

100011212220 is an abundant number, since it is smaller than the sum of its proper divisors (186439098948).

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

100011212220 is a wasteful number, since it uses less digits than its factorization.

100011212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196099 (or 196097 counting only the distinct ones).

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

Adding to 100011212220 its reverse (22212110001), we get a palindrome (122223322221).

It can be divided in two parts, 10001 and 1212220, that added together give a palindrome (1222221).

The spelling of 100011212220 in words is "one hundred billion, eleven million, two hundred twelve thousand, two hundred twenty".