216822101209 has 12 divisors (see below), whose sum is σ = 252437084688. Its totient is φ = 185688757800.

The previous prime is 216822101207. The next prime is 216822101219. The reversal of 216822101209 is 902101228612.

It is not a de Polignac number, because 216822101209 - 2¹ = 216822101207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216822101207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1832007 + ... + 1946764.

It is an arithmetic number, because the mean of its divisors is an integer number (21036423724).

Almost surely, 2^216822101209 is an apocalyptic number.

It is an amenable number.

216822101209 is a deficient number, since it is larger than the sum of its proper divisors (35614983479).

216822101209 is a wasteful number, since it uses less digits than its factorization.

216822101209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779956 (or 3779949 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 216822101209 in words is "two hundred sixteen billion, eight hundred twenty-two million, one hundred one thousand, two hundred nine".