20012101171 has 2 divisors, whose sum is σ = 20012101172. Its totient is φ = 20012101170.

The previous prime is 20012101129. The next prime is 20012101247. The reversal of 20012101171 is 17110121002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012101171 - 2¹¹ = 20012099123 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012131171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006050585 + 10006050586.

It is an arithmetic number, because the mean of its divisors is an integer number (10006050586).

Almost surely, 2^20012101171 is an apocalyptic number.

20012101171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012101171 is an equidigital number, since it uses as much as digits as its factorization.

20012101171 is an evil number, because the sum of its binary digits is even.

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

Adding to 20012101171 its reverse (17110121002), we get a palindrome (37122222173).

The spelling of 20012101171 in words is "twenty billion, twelve million, one hundred one thousand, one hundred seventy-one".