212120210201220 has 72 divisors (see below), whose sum is σ = 645052038258264. Its totient is φ = 56422907278848.

The previous prime is 212120210201189. The next prime is 212120210201243. The reversal of 212120210201220 is 22102012021212.

It is a happy number.

212120210201220 is a `hidden beast` number, since 2 + 1 + 212 + 0 + 210 + 20 + 1 + 220 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 94037084241984 + 118083125959236 = 9697272^2 + 10866606^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212120210201193 and 212120210201202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1484116969 + ... + 1484259888.

Almost surely, 2^{212120210201220} is an apocalyptic number.

212120210201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212120210201220 is an abundant number, since it is smaller than the sum of its proper divisors (432931828057044).

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

212120210201220 is a wasteful number, since it uses less digits than its factorization.

212120210201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968377269 (or 2968377264 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212120210201220 its reverse (22102012021212), we get a palindrome (234222222222432).

The spelling of 212120210201220 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred ten million, two hundred one thousand, two hundred twenty".