212000212102221 has 6 divisors (see below), whose sum is σ = 306222528592110. Its totient is φ = 141333474734808.

The previous prime is 212000212102219. The next prime is 212000212102267. The reversal of 212000212102221 is 122201212000212.

It is a happy number.

212000212102221 is a `hidden beast` number, since 21 + 200 + 0 + 212 + 10 + 2 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 199458733556196 + 12541478546025 = 14122986^2 + 3541395^2 .

It is not a de Polignac number, because 212000212102221 - 2¹ = 212000212102219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212000212102194 and 212000212102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212000212102271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11777789561226 + ... + 11777789561243.

It is an arithmetic number, because the mean of its divisors is an integer number (51037088098685).

Almost surely, 2^{212000212102221} is an apocalyptic number.

It is an amenable number.

212000212102221 is a deficient number, since it is larger than the sum of its proper divisors (94222316489889).

212000212102221 is a wasteful number, since it uses less digits than its factorization.

212000212102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23555579122475 (or 23555579122472 counting only the distinct ones).

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

Adding to 212000212102221 its reverse (122201212000212), we get a palindrome (334201424102433).

The spelling of 212000212102221 in words is "two hundred twelve trillion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".