12213123223312 has 120 divisors (see below), whose sum is σ = 27812320194456. Its totient is φ = 5173132800000.

The previous prime is 12213123223309. The next prime is 12213123223313. The reversal of 12213123223312 is 21332232131221.

It can be written as a sum of positive squares in 4 ways, for example, as 4687121080576 + 7526002142736 = 2164976^2 + 2743356^2 .

It is not an unprimeable number, because it can be changed into a prime (12213123223313) 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 23 ways as a sum of consecutive naturals, for example, 1487062 + ... + 5161162.

Almost surely, 2^{12213123223312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12213123223312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13906160097228).

12213123223312 is an abundant number, since it is smaller than the sum of its proper divisors (15599196971144).

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

12213123223312 is a wasteful number, since it uses less digits than its factorization.

12213123223312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674249 (or 3674232 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

Adding to 12213123223312 its reverse (21332232131221), we get a palindrome (33545355354533).

The spelling of 12213123223312 in words is "twelve trillion, two hundred thirteen billion, one hundred twenty-three million, two hundred twenty-three thousand, three hundred twelve".