12665312200 has 24 divisors (see below), whose sum is σ = 29446851330. Its totient is φ = 5066124800.

The previous prime is 12665312197. The next prime is 12665312249. The reversal of 12665312200 is 221356621.

It can be written as a sum of positive squares in 3 ways, for example, as 4843324836 + 7821987364 = 69594^2 + 88442^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31663081 + ... + 31663480.

Almost surely, 2^12665312200 is an apocalyptic number.

12665312200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12665312200 is an abundant number, since it is smaller than the sum of its proper divisors (16781539130).

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

12665312200 is a wasteful number, since it uses less digits than its factorization.

12665312200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63326577 (or 63326568 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 12665312200 its reverse (221356621), we get a palindrome (12886668821).

The spelling of 12665312200 in words is "twelve billion, six hundred sixty-five million, three hundred twelve thousand, two hundred".