12511131200 has 42 divisors (see below), whose sum is σ = 30785206146. Its totient is φ = 5004451840.

The previous prime is 12511131163. The next prime is 12511131209. The reversal of 12511131200 is 213111521.

It can be written as a sum of positive squares in 3 ways, for example, as 4734976 + 12506396224 = 2176^2 + 111832^2 .

It is a super-2 number, since 2×12511131200² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12511131209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3908129 + ... + 3911328.

Almost surely, 2^12511131200 is an apocalyptic number.

12511131200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12511131200 is an abundant number, since it is smaller than the sum of its proper divisors (18274074946).

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

12511131200 is an equidigital number, since it uses as much as digits as its factorization.

12511131200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7819479 (or 7819464 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 12511131200 its reverse (213111521), we get a palindrome (12724242721).

The spelling of 12511131200 in words is "twelve billion, five hundred eleven million, one hundred thirty-one thousand, two hundred".