10201111202171 has 2 divisors, whose sum is σ = 10201111202172. Its totient is φ = 10201111202170.

The previous prime is 10201111202167. The next prime is 10201111202273. The reversal of 10201111202171 is 17120211110201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10201111202171 - 2² = 10201111202167 is a prime.

It is a super-2 number, since 2×10201111202171² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10201111202101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100555601085 + 5100555601086.

It is an arithmetic number, because the mean of its divisors is an integer number (5100555601086).

Almost surely, 2^{10201111202171} is an apocalyptic number.

10201111202171 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201111202171 is an equidigital number, since it uses as much as digits as its factorization.

10201111202171 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 20.

Adding to 10201111202171 its reverse (17120211110201), we get a palindrome (27321322312372).

The spelling of 10201111202171 in words is "ten trillion, two hundred one billion, one hundred eleven million, two hundred two thousand, one hundred seventy-one".