12211221230312 has 16 divisors (see below), whose sum is σ = 24657273638340. Its totient is φ = 5635948260096.

The previous prime is 12211221230293. The next prime is 12211221230317. The reversal of 12211221230312 is 21303212211221.

It can be written as a sum of positive squares in 2 ways, for example, as 10320117700036 + 1891103530276 = 3212494^2 + 1375174^2 .

It is a super-2 number, since 2×12211221230312² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12211221230317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58707794273 + ... + 58707794480.

Almost surely, 2^{12211221230312} is an apocalyptic number.

It is an amenable number.

12211221230312 is an abundant number, since it is smaller than the sum of its proper divisors (12446052408028).

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

12211221230312 is a wasteful number, since it uses less digits than its factorization.

12211221230312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117415588772 (or 117415588768 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 12211221230312 its reverse (21303212211221), we get a palindrome (33514433441533).

The spelling of 12211221230312 in words is "twelve trillion, two hundred eleven billion, two hundred twenty-one million, two hundred thirty thousand, three hundred twelve".