12221132312 has 16 divisors (see below), whose sum is σ = 24262542360. Its totient is φ = 5751121024.

The previous prime is 12221132309. The next prime is 12221132323. The reversal of 12221132312 is 21323112221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44930498 + ... + 44930769.

Almost surely, 2^12221132312 is an apocalyptic number.

It is an amenable number.

12221132312 is a deficient number, since it is larger than the sum of its proper divisors (12041410048).

12221132312 is a wasteful number, since it uses less digits than its factorization.

12221132312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89861290 (or 89861286 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 12221132312 its reverse (21323112221), we get a palindrome (33544244533).

The spelling of 12221132312 in words is "twelve billion, two hundred twenty-one million, one hundred thirty-two thousand, three hundred twelve".