201100100220 has 96 divisors (see below), whose sum is σ = 662447419200. Its totient is φ = 50472179712.

The previous prime is 201100100209. The next prime is 201100100249. The reversal of 201100100220 is 22001001102.

It is a Harshad number since it is a multiple of its sum of digits (9).

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, 10943985 + ... + 10962344.

It is an arithmetic number, because the mean of its divisors is an integer number (6900493950).

Almost surely, 2^201100100220 is an apocalyptic number.

201100100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201100100220 is an abundant number, since it is smaller than the sum of its proper divisors (461347318980).

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

201100100220 is a wasteful number, since it uses less digits than its factorization.

201100100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21906364 (or 21906356 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 201100100220 its reverse (22001001102), we get a palindrome (223101101322).

The spelling of 201100100220 in words is "two hundred one billion, one hundred million, one hundred thousand, two hundred twenty".