2011011612171 has 4 divisors (see below), whose sum is σ = 2681348816232. Its totient is φ = 1340674408112.

The previous prime is 2011011612157. The next prime is 2011011612187. The reversal of 2011011612171 is 1712161101102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2011011612171 - 2¹⁷ = 2011011481099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011011612101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335168602026 + ... + 335168602031.

It is an arithmetic number, because the mean of its divisors is an integer number (670337204058).

Almost surely, 2^{2011011612171} is an apocalyptic number.

2011011612171 is a deficient number, since it is larger than the sum of its proper divisors (670337204061).

2011011612171 is an equidigital number, since it uses as much as digits as its factorization.

2011011612171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670337204060.

The product of its (nonzero) digits is 168, while the sum is 24.

Adding to 2011011612171 its reverse (1712161101102), we get a palindrome (3723172713273).

The spelling of 2011011612171 in words is "two trillion, eleven billion, eleven million, six hundred twelve thousand, one hundred seventy-one".