12131310550 has 12 divisors (see below), whose sum is σ = 22564237716. Its totient is φ = 4852524200.

The previous prime is 12131310497. The next prime is 12131310553. The reversal of 12131310550 is 5501313121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131310553) 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, 121313056 + ... + 121313155.

It is an arithmetic number, because the mean of its divisors is an integer number (1880353143).

Almost surely, 2^12131310550 is an apocalyptic number.

12131310550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12131310550 is a deficient number, since it is larger than the sum of its proper divisors (10432927166).

12131310550 is a wasteful number, since it uses less digits than its factorization.

12131310550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242626223 (or 242626218 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

Adding to 12131310550 its reverse (5501313121), we get a palindrome (17632623671).

The spelling of 12131310550 in words is "twelve billion, one hundred thirty-one million, three hundred ten thousand, five hundred fifty".