12012012216 has 48 divisors (see below), whose sum is σ = 33224724000. Its totient is φ = 3918811392.

The previous prime is 12012012191. The next prime is 12012012217. The reversal of 12012012216 is 61221021021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012012217) 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, 1771441 + ... + 1778208.

It is an arithmetic number, because the mean of its divisors is an integer number (692181750).

Almost surely, 2^12012012216 is an apocalyptic number.

It is an amenable number.

12012012216 is an abundant number, since it is smaller than the sum of its proper divisors (21212711784).

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

12012012216 is a wasteful number, since it uses less digits than its factorization.

12012012216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3549708 (or 3549701 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12012012216 its reverse (61221021021), we get a palindrome (73233033237).

The spelling of 12012012216 in words is "twelve billion, twelve million, twelve thousand, two hundred sixteen".