12216304716 has 72 divisors (see below), whose sum is σ = 35807600640. Its totient is φ = 3173063520.

The previous prime is 12216304699. The next prime is 12216304717. The reversal of 12216304716 is 61740361221.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12216304717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 590796 + ... + 611123.

Almost surely, 2^12216304716 is an apocalyptic number.

It is an amenable number.

12216304716 is an abundant number, since it is smaller than the sum of its proper divisors (23591295924).

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

12216304716 is a wasteful number, since it uses less digits than its factorization.

12216304716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201955 (or 1201942 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

Adding to 12216304716 its reverse (61740361221), we get a palindrome (73956665937).

The spelling of 12216304716 in words is "twelve billion, two hundred sixteen million, three hundred four thousand, seven hundred sixteen".