1216383336171 has 32 divisors (see below), whose sum is σ = 1840069235520. Its totient is φ = 793975468032.

The previous prime is 1216383336151. The next prime is 1216383336193. The reversal of 1216383336171 is 1716333836121.

1216383336171 is a `hidden beast` number, since 1 + 2 + 1 + 638 + 3 + 3 + 3 + 6 + 1 + 7 + 1 = 666.

It is not a de Polignac number, because 1216383336171 - 2¹⁵ = 1216383303403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216383336131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1982310 + ... + 2522363.

It is an arithmetic number, because the mean of its divisors is an integer number (57502163610).

Almost surely, 2^{1216383336171} is an apocalyptic number.

1216383336171 is a deficient number, since it is larger than the sum of its proper divisors (623685899349).

1216383336171 is a wasteful number, since it uses less digits than its factorization.

1216383336171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504892 (or 4504886 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The spelling of 1216383336171 in words is "one trillion, two hundred sixteen billion, three hundred eighty-three million, three hundred thirty-six thousand, one hundred seventy-one".