12203021312 has 44 divisors (see below), whose sum is σ = 25454788896. Its totient is φ = 5836216320.

The previous prime is 12203021291. The next prime is 12203021317. The reversal of 12203021312 is 21312030221.

It is a super-2 number, since 2×12203021312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12203021317) 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, 235514 + ... + 282617.

Almost surely, 2^12203021312 is an apocalyptic number.

It is an amenable number.

12203021312 is an abundant number, since it is smaller than the sum of its proper divisors (13251767584).

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

12203021312 is an equidigital number, since it uses as much as digits as its factorization.

12203021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518174 (or 518156 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12203021312 its reverse (21312030221), we get a palindrome (33515051533).

The spelling of 12203021312 in words is "twelve billion, two hundred three million, twenty-one thousand, three hundred twelve".