212120202201220 has 24 divisors (see below), whose sum is σ = 450044717664024. Its totient is φ = 83973358396416.

The previous prime is 212120202201217. The next prime is 212120202201247. The reversal of 212120202201220 is 22102202021212.

It can be written as a sum of positive squares in 4 ways, for example, as 1702664839044 + 210417537362176 = 1304862^2 + 14505776^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54670153267 + ... + 54670157146.

It is an arithmetic number, because the mean of its divisors is an integer number (18751863236001).

Almost surely, 2^{212120202201220} is an apocalyptic number.

212120202201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212120202201220 is an abundant number, since it is smaller than the sum of its proper divisors (237924515462804).

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

212120202201220 is a wasteful number, since it uses less digits than its factorization.

212120202201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109340310519 (or 109340310517 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 212120202201220 its reverse (22102202021212), we get a palindrome (234222404222432).

The spelling of 212120202201220 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred two million, two hundred one thousand, two hundred twenty".