12315445212 has 24 divisors (see below), whose sum is σ = 32841187456. Its totient is φ = 3518698608.

The previous prime is 12315445211. The next prime is 12315445231. The reversal of 12315445212 is 21254451321.

It is a self number, because there is not a number n which added to its sum of digits gives 12315445212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12315445211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73306138 + ... + 73306305.

Almost surely, 2^12315445212 is an apocalyptic number.

12315445212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12315445212 is an abundant number, since it is smaller than the sum of its proper divisors (20525742244).

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

12315445212 is a wasteful number, since it uses less digits than its factorization.

12315445212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146612457 (or 146612455 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 12315445212 its reverse (21254451321), we get a palindrome (33569896533).

The spelling of 12315445212 in words is "twelve billion, three hundred fifteen million, four hundred forty-five thousand, two hundred twelve".