20102212100171 has 2 divisors, whose sum is σ = 20102212100172. Its totient is φ = 20102212100170.

The previous prime is 20102212100063. The next prime is 20102212100213. The reversal of 20102212100171 is 17100121220102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102212100171 is a prime.

It is a super-2 number, since 2×20102212100171² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20102212100671) 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, 10051106050085 + 10051106050086.

It is an arithmetic number, because the mean of its divisors is an integer number (10051106050086).

Almost surely, 2^{20102212100171} is an apocalyptic number.

20102212100171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102212100171 is an equidigital number, since it uses as much as digits as its factorization.

20102212100171 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 20102212100171 its reverse (17100121220102), we get a palindrome (37202333320273).

The spelling of 20102212100171 in words is "twenty trillion, one hundred two billion, two hundred twelve million, one hundred thousand, one hundred seventy-one".