12133231220 has 48 divisors (see below), whose sum is σ = 27838641600. Its totient is φ = 4405336320.

The previous prime is 12133231213. The next prime is 12133231259. The reversal of 12133231220 is 2213233121.

12133231220 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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 12133231192 and 12133231201.

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 15 ways as a sum of consecutive naturals, for example, 103136 + ... + 186824.

It is an arithmetic number, because the mean of its divisors is an integer number (579971700).

Almost surely, 2^12133231220 is an apocalyptic number.

12133231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12133231220 is an abundant number, since it is smaller than the sum of its proper divisors (15705410380).

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

12133231220 is a wasteful number, since it uses less digits than its factorization.

12133231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84368 (or 84366 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12133231220 its reverse (2213233121), we get a palindrome (14346464341).

The spelling of 12133231220 in words is "twelve billion, one hundred thirty-three million, two hundred thirty-one thousand, two hundred twenty".