12131231200 has 144 divisors (see below), whose sum is σ = 32629942800. Its totient is φ = 4367360000.

The previous prime is 12131231173. The next prime is 12131231213. The reversal of 12131231200 is 213213121.

12131231200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 881976 + ... + 895624.

It is an arithmetic number, because the mean of its divisors is an integer number (226596825).

Almost surely, 2^12131231200 is an apocalyptic number.

12131231200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12131231200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16314971400).

12131231200 is an abundant number, since it is smaller than the sum of its proper divisors (20498711600).

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

12131231200 is a wasteful number, since it uses less digits than its factorization.

12131231200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13781 (or 13768 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12131231200 its reverse (213213121), we get a palindrome (12344444321).

The spelling of 12131231200 in words is "twelve billion, one hundred thirty-one million, two hundred thirty-one thousand, two hundred".