20020201202171 has 2 divisors, whose sum is σ = 20020201202172. Its totient is φ = 20020201202170.

The previous prime is 20020201202051. The next prime is 20020201202191. The reversal of 20020201202171 is 17120210202002.

It is an a-pointer prime, because the next prime (20020201202191) can be obtained adding 20020201202171 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020201202171 is a prime.

It is a super-2 number, since 2×20020201202171² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20020201202191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010100601085 + 10010100601086.

It is an arithmetic number, because the mean of its divisors is an integer number (10010100601086).

Almost surely, 2^{20020201202171} is an apocalyptic number.

20020201202171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020201202171 is an equidigital number, since it uses as much as digits as its factorization.

20020201202171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 20020201202171 its reverse (17120210202002), we get a palindrome (37140411404173).

The spelling of 20020201202171 in words is "twenty trillion, twenty billion, two hundred one million, two hundred two thousand, one hundred seventy-one".