210221200001 has 2 divisors, whose sum is σ = 210221200002. Its totient is φ = 210221200000.

The previous prime is 210221199959. The next prime is 210221200003. The reversal of 210221200001 is 100002122012.

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., 125758890625 + 84462309376 = 354625^2 + 290624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210221200001 is a prime.

Together with 210221200003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (210221200003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110600000 + 105110600001.

It is an arithmetic number, because the mean of its divisors is an integer number (105110600001).

Almost surely, 2^210221200001 is an apocalyptic number.

It is an amenable number.

210221200001 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221200001 is an equidigital number, since it uses as much as digits as its factorization.

210221200001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210221200001 its reverse (100002122012), we get a palindrome (310223322013).

The spelling of 210221200001 in words is "two hundred ten billion, two hundred twenty-one million, two hundred thousand, one".