20210210021171 has 2 divisors, whose sum is σ = 20210210021172. Its totient is φ = 20210210021170.

The previous prime is 20210210021161. The next prime is 20210210021231. The reversal of 20210210021171 is 17112001201202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20210210021171 - 2³⁰ = 20209136279347 is a prime.

It is a super-2 number, since 2×20210210021171² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20210210021161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105105010585 + 10105105010586.

It is an arithmetic number, because the mean of its divisors is an integer number (10105105010586).

Almost surely, 2^{20210210021171} is an apocalyptic number.

20210210021171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210210021171 is an equidigital number, since it uses as much as digits as its factorization.

20210210021171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 20210210021171 its reverse (17112001201202), we get a palindrome (37322211222373).

The spelling of 20210210021171 in words is "twenty trillion, two hundred ten billion, two hundred ten million, twenty-one thousand, one hundred seventy-one".