2216720720512 has 16 divisors (see below), whose sum is σ = 4416123310650. Its totient is φ = 1108360360192.

The previous prime is 2216720720507. The next prime is 2216720720519. The reversal of 2216720720512 is 2150270276122.

It can be written as a sum of positive squares in only one way, i.e., 2174964250176 + 41756470336 = 1474776^2 + 204344^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (2216720720519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8659065187 + ... + 8659065442.

Almost surely, 2^{2216720720512} is an apocalyptic number.

It is an amenable number.

2216720720512 is a deficient number, since it is larger than the sum of its proper divisors (2199402590138).

2216720720512 is an equidigital number, since it uses as much as digits as its factorization.

2216720720512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17318130643 (or 17318130631 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

Adding to 2216720720512 its reverse (2150270276122), we get a palindrome (4366990996634).

The spelling of 2216720720512 in words is "two trillion, two hundred sixteen billion, seven hundred twenty million, seven hundred twenty thousand, five hundred twelve".