212112186717 has 16 divisors (see below), whose sum is σ = 284590748160. Its totient is φ = 140521115952.

The previous prime is 212112186709. The next prime is 212112186749. The reversal of 212112186717 is 717681211212.

It is not a de Polignac number, because 212112186717 - 2³ = 212112186709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112186707) 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, 4075384 + ... + 4127102.

It is an arithmetic number, because the mean of its divisors is an integer number (17786921760).

Almost surely, 2^212112186717 is an apocalyptic number.

It is an amenable number.

212112186717 is a deficient number, since it is larger than the sum of its proper divisors (72478561443).

212112186717 is a wasteful number, since it uses less digits than its factorization.

212112186717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60272.

The product of its digits is 18816, while the sum is 39.

Adding to 212112186717 its reverse (717681211212), we get a palindrome (929793397929).

The spelling of 212112186717 in words is "two hundred twelve billion, one hundred twelve million, one hundred eighty-six thousand, seven hundred seventeen".