216603122013 has 12 divisors (see below), whose sum is σ = 312878174908. Its totient is φ = 144398851200.

The previous prime is 216603122011. The next prime is 216603122039. The reversal of 216603122013 is 310221306612.

216603122013 is a `hidden beast` number, since 2 + 16 + 603 + 12 + 20 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25785294084 + 190817827929 = 160578^2 + 436827^2 .

It is not a de Polignac number, because 216603122013 - 2¹ = 216603122011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216603122011) 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, 198231 + ... + 687387.

Almost surely, 2^216603122013 is an apocalyptic number.

It is an amenable number.

216603122013 is a deficient number, since it is larger than the sum of its proper divisors (96275052895).

216603122013 is a wasteful number, since it uses less digits than its factorization.

216603122013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538364 (or 538361 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 216603122013 its reverse (310221306612), we get a palindrome (526824428625).

The spelling of 216603122013 in words is "two hundred sixteen billion, six hundred three million, one hundred twenty-two thousand, thirteen".