210221010201001 has 2 divisors, whose sum is σ = 210221010201002. Its totient is φ = 210221010201000.

The previous prime is 210221010200951. The next prime is 210221010201049. The reversal of 210221010201001 is 100102010122012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184342667971225 + 25878342229776 = 13577285^2 + 5087076^2 .

It is a cyclic number.

It is not a de Polignac number, because 210221010201001 - 2²¹ = 210221008103849 is a prime.

It is not a weakly prime, because it can be changed into another prime (210221010205001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110505100500 + 105110505100501.

It is an arithmetic number, because the mean of its divisors is an integer number (105110505100501).

Almost surely, 2^{210221010201001} is an apocalyptic number.

It is an amenable number.

210221010201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221010201001 is an equidigital number, since it uses as much as digits as its factorization.

210221010201001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210221010201001 its reverse (100102010122012), we get a palindrome (310323020323013).

The spelling of 210221010201001 in words is "two hundred ten trillion, two hundred twenty-one billion, ten million, two hundred one thousand, one".