201210201220 has 24 divisors (see below), whose sum is σ = 482904483264. Its totient is φ = 68986354656.

The previous prime is 201210201173. The next prime is 201210201221. The reversal of 201210201220 is 22102012102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201210201220.

It is not an unprimeable number, because it can be changed into a prime (201210201221) by changing a digit.

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, 718607722 + ... + 718608001.

It is an arithmetic number, because the mean of its divisors is an integer number (20121020136).

Almost surely, 2^201210201220 is an apocalyptic number.

201210201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201210201220 is an abundant number, since it is smaller than the sum of its proper divisors (281694282044).

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

201210201220 is a wasteful number, since it uses less digits than its factorization.

201210201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437215739 (or 1437215737 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201210201220 its reverse (22102012102), we get a palindrome (223312213322).

The spelling of 201210201220 in words is "two hundred one billion, two hundred ten million, two hundred one thousand, two hundred twenty".