201220 has 12 divisors (see below), whose sum is σ = 422604. Its totient is φ = 80480.

The previous prime is 201211. The next prime is 201233. The reversal of 201220 is 22102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 93636 + 107584 = 306^2 + 328^2 .

It is a nialpdrome in base 12.

It is an unprimeable number.

201220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5011 + ... + 5050.

It is an arithmetic number, because the mean of its divisors is an integer number (35217).

2²⁰¹²²⁰ is an apocalyptic number.

201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201220 is an abundant number, since it is smaller than the sum of its proper divisors (221384).

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

201220 is a wasteful number, since it uses less digits than its factorization.

201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10070 (or 10068 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 201220 is about 448.5755231842. The cubic root of 201220 is about 58.5990238512.

Adding to 201220 its reverse (22102), we get a palindrome (223322).

The spelling of 201220 in words is "two hundred one thousand, two hundred twenty", and thus it is an iban number.