212002204221 has 12 divisors (see below), whose sum is σ = 306230049372. Its totient is φ = 141332659776.

The previous prime is 212002204163. The next prime is 212002204261. The reversal of 212002204221 is 122402200212.

212002204221 is a `hidden beast` number, since 2 + 1 + 20 + 0 + 220 + 422 + 1 = 666.

212002204221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 193503212100 + 18498992121 = 439890^2 + 136011^2 .

It is not a de Polignac number, because 212002204221 - 2¹⁰ = 212002203197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212002204194 and 212002204203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212002204261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 650545 + ... + 920441.

It is an arithmetic number, because the mean of its divisors is an integer number (25519170781).

Almost surely, 2^212002204221 is an apocalyptic number.

It is an amenable number.

212002204221 is a deficient number, since it is larger than the sum of its proper divisors (94227845151).

212002204221 is a wasteful number, since it uses less digits than its factorization.

212002204221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357180 (or 357177 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 212002204221 its reverse (122402200212), we get a palindrome (334404404433).

The spelling of 212002204221 in words is "two hundred twelve billion, two million, two hundred four thousand, two hundred twenty-one".