210220000212221 has 6 divisors (see below), whose sum is σ = 219757391526750. Its totient is φ = 201080000202488.

The previous prime is 210220000212163. The next prime is 210220000212247. The reversal of 210220000212221 is 122212000022012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 197627757624196 + 12592242588025 = 14058014^2 + 3548555^2 .

It is a de Polignac number, because none of the positive numbers 2^k-210220000212221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210220000212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220000212251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198695651846 + ... + 198695652903.

It is an arithmetic number, because the mean of its divisors is an integer number (36626231921125).

Almost surely, 2^{210220000212221} is an apocalyptic number.

It is an amenable number.

210220000212221 is a deficient number, since it is larger than the sum of its proper divisors (9537391314529).

210220000212221 is an equidigital number, since it uses as much as digits as its factorization.

210220000212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397391304795 (or 397391304772 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210220000212221 its reverse (122212000022012), we get a palindrome (332432000234233).

The spelling of 210220000212221 in words is "two hundred ten trillion, two hundred twenty billion, two hundred twelve thousand, two hundred twenty-one".