201020211001 has 2 divisors, whose sum is σ = 201020211002. Its totient is φ = 201020211000.

The previous prime is 201020210917. The next prime is 201020211023. The reversal of 201020211001 is 100112020102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101353089600 + 99667121401 = 318360^2 + 315701^2 .

It is a cyclic number.

It is not a de Polignac number, because 201020211001 - 2¹⁷ = 201020079929 is a prime.

It is a super-2 number, since 2×201020211001² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201020211701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510105500 + 100510105501.

It is an arithmetic number, because the mean of its divisors is an integer number (100510105501).

Almost surely, 2^201020211001 is an apocalyptic number.

It is an amenable number.

201020211001 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020211001 is an equidigital number, since it uses as much as digits as its factorization.

201020211001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201020211001 its reverse (100112020102), we get a palindrome (301132231103).

The spelling of 201020211001 in words is "two hundred one billion, twenty million, two hundred eleven thousand, one".