210221202001 has 2 divisors, whose sum is σ = 210221202002. Its totient is φ = 210221202000.

The previous prime is 210221201963. The next prime is 210221202013. The reversal of 210221202001 is 100202122012.

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., 112342950976 + 97878251025 = 335176^2 + 312855^2 .

It is a cyclic number.

It is not a de Polignac number, because 210221202001 - 2¹⁵ = 210221169233 is a prime.

It is not a weakly prime, because it can be changed into another prime (210221200001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110601000 + 105110601001.

It is an arithmetic number, because the mean of its divisors is an integer number (105110601001).

Almost surely, 2^210221202001 is an apocalyptic number.

It is an amenable number.

210221202001 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221202001 is an equidigital number, since it uses as much as digits as its factorization.

210221202001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210221202001 its reverse (100202122012), we get a palindrome (310423324013).

The spelling of 210221202001 in words is "two hundred ten billion, two hundred twenty-one million, two hundred two thousand, one".