217220100112 has 40 divisors (see below), whose sum is σ = 446248447200. Its totient is φ = 102142662912.

The previous prime is 217220100089. The next prime is 217220100151. The reversal of 217220100112 is 211001022712.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 217220100112.

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, 2566162 + ... + 2649457.

It is an arithmetic number, because the mean of its divisors is an integer number (11156211180).

Almost surely, 2^217220100112 is an apocalyptic number.

It is an amenable number.

217220100112 is an abundant number, since it is smaller than the sum of its proper divisors (229028347088).

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

217220100112 is a wasteful number, since it uses less digits than its factorization.

217220100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5215783 (or 5215777 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 217220100112 its reverse (211001022712), we get a palindrome (428221122824).

The spelling of 217220100112 in words is "two hundred seventeen billion, two hundred twenty million, one hundred thousand, one hundred twelve".