20102211122171 has 2 divisors, whose sum is σ = 20102211122172. Its totient is φ = 20102211122170.

The previous prime is 20102211122117. The next prime is 20102211122233. The reversal of 20102211122171 is 17122111220102.

Together with previous prime (20102211122117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20102211122171 - 2⁶ = 20102211122107 is a prime.

It is not a weakly prime, because it can be changed into another prime (20102211127171) 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, 10051105561085 + 10051105561086.

It is an arithmetic number, because the mean of its divisors is an integer number (10051105561086).

Almost surely, 2^{20102211122171} is an apocalyptic number.

20102211122171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102211122171 is an equidigital number, since it uses as much as digits as its factorization.

20102211122171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 20102211122171 its reverse (17122111220102), we get a palindrome (37224322342273).

The spelling of 20102211122171 in words is "twenty trillion, one hundred two billion, two hundred eleven million, one hundred twenty-two thousand, one hundred seventy-one".