212110002202221 has 12 divisors (see below), whose sum is σ = 307936348377372. Its totient is φ = 140688867787776.

The previous prime is 212110002202201. The next prime is 212110002202289. The reversal of 212110002202221 is 122202200011212.

It is a happy number.

212110002202221 is a `hidden beast` number, since 2 + 121 + 100 + 0 + 220 + 2 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 173715695015625 + 38394307186596 = 13180125^2 + 6196314^2 .

It is not a de Polignac number, because 212110002202221 - 2⁷ = 212110002202093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212110002202194 and 212110002202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212110002202201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59816693716 + ... + 59816697261.

It is an arithmetic number, because the mean of its divisors is an integer number (25661362364781).

Almost surely, 2^{212110002202221} is an apocalyptic number.

It is an amenable number.

212110002202221 is a deficient number, since it is larger than the sum of its proper divisors (95826346175151).

212110002202221 is a wasteful number, since it uses less digits than its factorization.

212110002202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119633391180 (or 119633391177 counting only the distinct ones).

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

Adding to 212110002202221 its reverse (122202200011212), we get a palindrome (334312202213433).

The spelling of 212110002202221 in words is "two hundred twelve trillion, one hundred ten billion, two million, two hundred two thousand, two hundred twenty-one".