2117124813 has 16 divisors (see below), whose sum is σ = 2859204096. Its totient is φ = 1393305600.

The previous prime is 2117124811. The next prime is 2117124817. The reversal of 2117124813 is 3184217112.

It is not a de Polignac number, because 2117124813 - 2¹ = 2117124811 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117124811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107620 + ... + 125762.

It is an arithmetic number, because the mean of its divisors is an integer number (178700256).

Almost surely, 2^2117124813 is an apocalyptic number.

It is an amenable number.

2117124813 is a deficient number, since it is larger than the sum of its proper divisors (742079283).

2117124813 is a wasteful number, since it uses less digits than its factorization.

2117124813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18644.

The product of its digits is 2688, while the sum is 30.

The square root of 2117124813 is about 46012.2246039028. The cubic root of 2117124813 is about 1284.0506471370.

The spelling of 2117124813 in words is "two billion, one hundred seventeen million, one hundred twenty-four thousand, eight hundred thirteen".