201100000220 has 96 divisors (see below), whose sum is σ = 492780879360. Its totient is φ = 67509216000.

The previous prime is 201100000183. The next prime is 201100000237. The reversal of 201100000220 is 22000001102.

It is a junction number, because it is equal to n+sod(n) for n = 201100000198 and 201100000207.

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, 2024762 + ... + 2121758.

It is an arithmetic number, because the mean of its divisors is an integer number (5133134160).

Almost surely, 2^201100000220 is an apocalyptic number.

201100000220 is a gapful number since it is divisible by the number (20) 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 201100000220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246390439680).

201100000220 is an abundant number, since it is smaller than the sum of its proper divisors (291680879140).

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

201100000220 is a wasteful number, since it uses less digits than its factorization.

201100000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97323 (or 97321 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 201100000220 its reverse (22000001102), we get a palindrome (223100001322).

The spelling of 201100000220 in words is "two hundred one billion, one hundred million, two hundred twenty", and thus it is an aban number.