12442320312 has 64 divisors (see below), whose sum is σ = 32619348000. Its totient is φ = 3949553664.

The previous prime is 12442320311. The next prime is 12442320313. The reversal of 12442320312 is 21302324421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12442320311) and next prime (12442320313).

It is a super-2 number, since 2×12442320312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12442320311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71637 + ... + 173252.

Almost surely, 2^12442320312 is an apocalyptic number.

12442320312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12442320312 is an abundant number, since it is smaller than the sum of its proper divisors (20177027688).

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

12442320312 is a wasteful number, since it uses less digits than its factorization.

12442320312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245000 (or 244996 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 12442320312 its reverse (21302324421), we get a palindrome (33744644733).

The spelling of 12442320312 in words is "twelve billion, four hundred forty-two million, three hundred twenty thousand, three hundred twelve".