201220104 has 32 divisors (see below), whose sum is σ = 507672000. Its totient is φ = 66457152.

The previous prime is 201220073. The next prime is 201220199. The reversal of 201220104 is 401022102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 201220104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35844 + ... + 41075.

It is an arithmetic number, because the mean of its divisors is an integer number (15864750).

Almost surely, 2^201220104 is an apocalyptic number.

201220104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

201220104 is an abundant number, since it is smaller than the sum of its proper divisors (306451896).

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

201220104 is a wasteful number, since it uses less digits than its factorization.

201220104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77037 (or 77033 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 201220104 is about 14185.2072244293. The cubic root of 201220104 is about 585.9903394681.

Adding to 201220104 its reverse (401022102), we get a palindrome (602242206).

The spelling of 201220104 in words is "two hundred one million, two hundred twenty thousand, one hundred four".