210102221204221 has 2 divisors, whose sum is σ = 210102221204222. Its totient is φ = 210102221204220.

The previous prime is 210102221204159. The next prime is 210102221204243. The reversal of 210102221204221 is 122402122201012.

It is an a-pointer prime, because the next prime (210102221204243) can be obtained adding 210102221204221 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202620278525625 + 7481942678596 = 14234475^2 + 2735314^2 .

It is a cyclic number.

It is not a de Polignac number, because 210102221204221 - 2²⁵ = 210102187649789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210102221204192 and 210102221204201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210102221204621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105051110602110 + 105051110602111.

It is an arithmetic number, because the mean of its divisors is an integer number (105051110602111).

Almost surely, 2^{210102221204221} is an apocalyptic number.

It is an amenable number.

210102221204221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210102221204221 is an equidigital number, since it uses as much as digits as its factorization.

210102221204221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 210102221204221 its reverse (122402122201012), we get a palindrome (332504343405233).

The spelling of 210102221204221 in words is "two hundred ten trillion, one hundred two billion, two hundred twenty-one million, two hundred four thousand, two hundred twenty-one".