12565122312 has 16 divisors (see below), whose sum is σ = 31412805840. Its totient is φ = 4188374096.

The previous prime is 12565122307. The next prime is 12565122319. The reversal of 12565122312 is 21322156521.

It is a self number, because there is not a number n which added to its sum of digits gives 12565122312.

It is not an unprimeable number, because it can be changed into a prime (12565122319) 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, 261773358 + ... + 261773405.

It is an arithmetic number, because the mean of its divisors is an integer number (1963300365).

Almost surely, 2^12565122312 is an apocalyptic number.

12565122312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12565122312 is an abundant number, since it is smaller than the sum of its proper divisors (18847683528).

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

12565122312 is a wasteful number, since it uses less digits than its factorization.

12565122312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523546772 (or 523546768 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

Adding to 12565122312 its reverse (21322156521), we get a palindrome (33887278833).

The spelling of 12565122312 in words is "twelve billion, five hundred sixty-five million, one hundred twenty-two thousand, three hundred twelve".