12306661312 has 56 divisors (see below), whose sum is σ = 26665805952. Its totient is φ = 5588755200.

The previous prime is 12306661217. The next prime is 12306661331. The reversal of 12306661312 is 21316660321.

It is a super-2 number, since 2×12306661312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 811237 + ... + 826267.

Almost surely, 2^12306661312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12306661312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13332902976).

12306661312 is an abundant number, since it is smaller than the sum of its proper divisors (14359144640).

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

12306661312 is a wasteful number, since it uses less digits than its factorization.

12306661312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16217 (or 16207 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

Subtracting 12306661312 from its reverse (21316660321), we obtain a palindrome (9009999009).

The spelling of 12306661312 in words is "twelve billion, three hundred six million, six hundred sixty-one thousand, three hundred twelve".