210002212001221 has 8 divisors (see below), whose sum is σ = 217244193013080. Its totient is φ = 202760266017792.

The previous prime is 210002212001191. The next prime is 210002212001237. The reversal of 210002212001221 is 122100212200012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10009187512900 + 199993024488321 = 3163730^2 + 14141889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210002212001221 - 2³³ = 209993622066629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210002212001195 and 210002212001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210002212001321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3742441 + ... + 20832913.

It is an arithmetic number, because the mean of its divisors is an integer number (27155524126635).

Almost surely, 2^{210002212001221} is an apocalyptic number.

It is an amenable number.

210002212001221 is a deficient number, since it is larger than the sum of its proper divisors (7241981011859).

210002212001221 is a wasteful number, since it uses less digits than its factorization.

210002212001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17514215.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210002212001221 its reverse (122100212200012), we get a palindrome (332102424201233).

The spelling of 210002212001221 in words is "two hundred ten trillion, two billion, two hundred twelve million, one thousand, two hundred twenty-one".