212105116415 has 8 divisors (see below), whose sum is σ = 254534849280. Its totient is φ = 169678286752.

The previous prime is 212105116411. The next prime is 212105116417. The reversal of 212105116415 is 514611501212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212105116415 - 2² = 212105116411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212105116411) 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 7 ways as a sum of consecutive naturals, for example, 561695 + ... + 860064.

It is an arithmetic number, because the mean of its divisors is an integer number (31816856160).

Almost surely, 2^212105116415 is an apocalyptic number.

212105116415 is a deficient number, since it is larger than the sum of its proper divisors (42429732865).

212105116415 is a wasteful number, since it uses less digits than its factorization.

212105116415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451601.

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 212105116415 its reverse (514611501212), we get a palindrome (726716617627).

The spelling of 212105116415 in words is "two hundred twelve billion, one hundred five million, one hundred sixteen thousand, four hundred fifteen".