12101211212171 has 2 divisors, whose sum is σ = 12101211212172. Its totient is φ = 12101211212170.

The previous prime is 12101211212161. The next prime is 12101211212179. The reversal of 12101211212171 is 17121211210121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101211212171 is a prime.

It is not a weakly prime, because it can be changed into another prime (12101211212179) 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, 6050605606085 + 6050605606086.

It is an arithmetic number, because the mean of its divisors is an integer number (6050605606086).

Almost surely, 2^{12101211212171} is an apocalyptic number.

12101211212171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101211212171 is an equidigital number, since it uses as much as digits as its factorization.

12101211212171 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 23.

Adding to 12101211212171 its reverse (17121211210121), we get a palindrome (29222422422292).

The spelling of 12101211212171 in words is "twelve trillion, one hundred one billion, two hundred eleven million, two hundred twelve thousand, one hundred seventy-one".