20101143242171 has 2 divisors, whose sum is σ = 20101143242172. Its totient is φ = 20101143242170.

The previous prime is 20101143242153. The next prime is 20101143242293. The reversal of 20101143242171 is 17124234110102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20101143242171 - 2⁶ = 20101143242107 is a prime.

It is not a weakly prime, because it can be changed into another prime (20101143232171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050571621085 + 10050571621086.

It is an arithmetic number, because the mean of its divisors is an integer number (10050571621086).

Almost surely, 2^{20101143242171} is an apocalyptic number.

20101143242171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101143242171 is an equidigital number, since it uses as much as digits as its factorization.

20101143242171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

Adding to 20101143242171 its reverse (17124234110102), we get a palindrome (37225377352273).

The spelling of 20101143242171 in words is "twenty trillion, one hundred one billion, one hundred forty-three million, two hundred forty-two thousand, one hundred seventy-one".