12135134250 has 48 divisors (see below), whose sum is σ = 32813409096. Its totient is φ = 3236035200.

The previous prime is 12135134243. The next prime is 12135134257. The reversal of 12135134250 is 5243153121.

12135134250 is a `hidden beast` number, since 121 + 3 + 513 + 4 + 25 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (12135134243) and next prime (12135134257).

It can be written as a sum of positive squares in 4 ways, for example, as 5174068761 + 6961065489 = 71931^2 + 83433^2 .

It is a super-2 number, since 2×12135134250² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12135134257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2694447 + ... + 2698946.

Almost surely, 2^12135134250 is an apocalyptic number.

12135134250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12135134250 is an abundant number, since it is smaller than the sum of its proper divisors (20678274846).

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

12135134250 is a wasteful number, since it uses less digits than its factorization.

12135134250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5393416 (or 5393403 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 12135134250 its reverse (5243153121), we get a palindrome (17378287371).

The spelling of 12135134250 in words is "twelve billion, one hundred thirty-five million, one hundred thirty-four thousand, two hundred fifty".