12511251250 has 40 divisors (see below), whose sum is σ = 24207651072. Its totient is φ = 4843050000.

The previous prime is 12511251241. The next prime is 12511251257. The reversal of 12511251250 is 5215211521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (12511251257) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 122686 + ... + 200185.

Almost surely, 2^12511251250 is an apocalyptic number.

12511251250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12511251250 is a deficient number, since it is larger than the sum of its proper divisors (11696399822).

12511251250 is an equidigital number, since it uses as much as digits as its factorization.

12511251250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322924 (or 322909 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 25.

Adding to 12511251250 its reverse (5215211521), we get a palindrome (17726462771).

The spelling of 12511251250 in words is "twelve billion, five hundred eleven million, two hundred fifty-one thousand, two hundred fifty".