210001012171 has 2 divisors, whose sum is σ = 210001012172. Its totient is φ = 210001012170.

The previous prime is 210001012141. The next prime is 210001012213. The reversal of 210001012171 is 171210100012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210001012171 - 2³⁵ = 175641273803 is a prime.

It is a super-2 number, since 2×210001012171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210001012141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105000506085 + 105000506086.

It is an arithmetic number, because the mean of its divisors is an integer number (105000506086).

Almost surely, 2^210001012171 is an apocalyptic number.

210001012171 is a deficient number, since it is larger than the sum of its proper divisors (1).

210001012171 is an equidigital number, since it uses as much as digits as its factorization.

210001012171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 210001012171 its reverse (171210100012), we get a palindrome (381211112183).

The spelling of 210001012171 in words is "two hundred ten billion, one million, twelve thousand, one hundred seventy-one".