1216330331171 has 8 divisors (see below), whose sum is σ = 1222637460624. Its totient is φ = 1210037234560.

The previous prime is 1216330331129. The next prime is 1216330331201. The reversal of 1216330331171 is 1711330336121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216330331171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216330331101) 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 7 ways as a sum of consecutive naturals, for example, 3334385 + ... + 3681138.

It is an arithmetic number, because the mean of its divisors is an integer number (152829682578).

Almost surely, 2^{1216330331171} is an apocalyptic number.

1216330331171 is a deficient number, since it is larger than the sum of its proper divisors (6307129453).

1216330331171 is an equidigital number, since it uses as much as digits as its factorization.

1216330331171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7016421.

The product of its (nonzero) digits is 6804, while the sum is 32.

Adding to 1216330331171 its reverse (1711330336121), we get a palindrome (2927660667292).

The spelling of 1216330331171 in words is "one trillion, two hundred sixteen billion, three hundred thirty million, three hundred thirty-one thousand, one hundred seventy-one".