217101205612 has 12 divisors (see below), whose sum is σ = 380053310616. Its totient is φ = 108514545440.

The previous prime is 217101205553. The next prime is 217101205613. The reversal of 217101205612 is 216502101712.

217101205612 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (217101205613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9000793 + ... + 9024880.

It is an arithmetic number, because the mean of its divisors is an integer number (31671109218).

Almost surely, 2^217101205612 is an apocalyptic number.

It is an amenable number.

217101205612 is a deficient number, since it is larger than the sum of its proper divisors (162952105004).

217101205612 is a wasteful number, since it uses less digits than its factorization.

217101205612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18028688 (or 18028686 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 28.

The spelling of 217101205612 in words is "two hundred seventeen billion, one hundred one million, two hundred five thousand, six hundred twelve".