12001132550 has 96 divisors (see below), whose sum is σ = 25192387584. Its totient is φ = 4215456000.

The previous prime is 12001132511. The next prime is 12001132567. The reversal of 12001132550 is 5523110021.

It is a happy number.

It is a super-3 number, since 3×12001132550³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2320067 + ... + 2325233.

It is an arithmetic number, because the mean of its divisors is an integer number (262420704).

Almost surely, 2^12001132550 is an apocalyptic number.

12001132550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12001132550 is an abundant number, since it is smaller than the sum of its proper divisors (13191255034).

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

12001132550 is a wasteful number, since it uses less digits than its factorization.

12001132550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5334 (or 5329 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 12001132550 its reverse (5523110021), we get a palindrome (17524242571).

The spelling of 12001132550 in words is "twelve billion, one million, one hundred thirty-two thousand, five hundred fifty".