2001212000171 has 2 divisors, whose sum is σ = 2001212000172. Its totient is φ = 2001212000170.

The previous prime is 2001212000159. The next prime is 2001212000251. The reversal of 2001212000171 is 1710002121002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001212000171 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001212000101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000606000085 + 1000606000086.

It is an arithmetic number, because the mean of its divisors is an integer number (1000606000086).

Almost surely, 2^{2001212000171} is an apocalyptic number.

2001212000171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001212000171 is an equidigital number, since it uses as much as digits as its factorization.

2001212000171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 2001212000171 its reverse (1710002121002), we get a palindrome (3711214121173).

The spelling of 2001212000171 in words is "two trillion, one billion, two hundred twelve million, one hundred seventy-one", and thus it is an aban number.