212117105615 has 8 divisors (see below), whose sum is σ = 254561551200. Its totient is φ = 169679668192.

The previous prime is 212117105593. The next prime is 212117105621. The reversal of 212117105615 is 516501711212.

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 212117105615 - 2⁸ = 212117105359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1685219 + ... + 1806708.

It is an arithmetic number, because the mean of its divisors is an integer number (31820193900).

Almost surely, 2^212117105615 is an apocalyptic number.

212117105615 is a deficient number, since it is larger than the sum of its proper divisors (42444445585).

212117105615 is a wasteful number, since it uses less digits than its factorization.

212117105615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3504081.

The product of its (nonzero) digits is 4200, while the sum is 32.

Adding to 212117105615 its reverse (516501711212), we get a palindrome (728618816827).

The spelling of 212117105615 in words is "two hundred twelve billion, one hundred seventeen million, one hundred five thousand, six hundred fifteen".