217022681040108 has 96 divisors (see below), whose sum is σ = 545457283472640. Its totient is φ = 66936868024320.

The previous prime is 217022681040103. The next prime is 217022681040133. The reversal of 217022681040108 is 801040186220712.

It is a self number, because there is not a number n which added to its sum of digits gives 217022681040108.

It is not an unprimeable number, because it can be changed into a prime (217022681040101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239559616 + ... + 240463832.

It is an arithmetic number, because the mean of its divisors is an integer number (5681846702840).

Almost surely, 2^{217022681040108} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 217022681040108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272728641736320).

217022681040108 is an abundant number, since it is smaller than the sum of its proper divisors (328434602432532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217022681040108 is a wasteful number, since it uses less digits than its factorization.

217022681040108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928767 (or 928765 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The spelling of 217022681040108 in words is "two hundred seventeen trillion, twenty-two billion, six hundred eighty-one million, forty thousand, one hundred eight".