210224244221 has 4 divisors (see below), whose sum is σ = 222590376252. Its totient is φ = 197858112192.

The previous prime is 210224244211. The next prime is 210224244281. The reversal of 210224244221 is 122442422012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78926721721 + 131297522500 = 280939^2 + 362350^2 .

It is a cyclic number.

It is not a de Polignac number, because 210224244221 - 2¹⁰ = 210224243197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210224244211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6183065990 + ... + 6183066023.

It is an arithmetic number, because the mean of its divisors is an integer number (55647594063).

Almost surely, 2^210224244221 is an apocalyptic number.

It is an amenable number.

210224244221 is a deficient number, since it is larger than the sum of its proper divisors (12366132031).

210224244221 is a wasteful number, since it uses less digits than its factorization.

210224244221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12366132030.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 210224244221 its reverse (122442422012), we get a palindrome (332666666233).

The spelling of 210224244221 in words is "two hundred ten billion, two hundred twenty-four million, two hundred forty-four thousand, two hundred twenty-one".