2011510012171 has 32 divisors (see below), whose sum is σ = 2447387136000. Its totient is φ = 1629398638080.

The previous prime is 2011510012163. The next prime is 2011510012181. The reversal of 2011510012171 is 1712100151102.

It is a cyclic number.

It is not a de Polignac number, because 2011510012171 - 2³ = 2011510012163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011510012111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5115030 + ... + 5494228.

It is an arithmetic number, because the mean of its divisors is an integer number (76480848000).

Almost surely, 2^{2011510012171} is an apocalyptic number.

2011510012171 is a deficient number, since it is larger than the sum of its proper divisors (435877123829).

2011510012171 is a wasteful number, since it uses less digits than its factorization.

2011510012171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380739.

The product of its (nonzero) digits is 140, while the sum is 22.

Adding to 2011510012171 its reverse (1712100151102), we get a palindrome (3723610163273).

The spelling of 2011510012171 in words is "two trillion, eleven billion, five hundred ten million, twelve thousand, one hundred seventy-one".