210002122002221 has 2 divisors, whose sum is σ = 210002122002222. Its totient is φ = 210002122002220.

The previous prime is 210002122002181. The next prime is 210002122002229. The reversal of 210002122002221 is 122200221200012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159804741132100 + 50197380870121 = 12641390^2 + 7085011^2 .

It is a cyclic number.

It is not a de Polignac number, because 210002122002221 - 2³⁸ = 209727244095277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210002122002221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210002122002229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105001061001110 + 105001061001111.

It is an arithmetic number, because the mean of its divisors is an integer number (105001061001111).

Almost surely, 2^{210002122002221} is an apocalyptic number.

It is an amenable number.

210002122002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210002122002221 is an equidigital number, since it uses as much as digits as its factorization.

210002122002221 is an evil number, because the sum of its binary digits is even.

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

Adding to 210002122002221 its reverse (122200221200012), we get a palindrome (332202343202233).

The spelling of 210002122002221 in words is "two hundred ten trillion, two billion, one hundred twenty-two million, two thousand, two hundred twenty-one".