12331204420 has 12 divisors (see below), whose sum is σ = 25895529324. Its totient is φ = 4932481760.

The previous prime is 12331204339. The next prime is 12331204423. The reversal of 12331204420 is 2440213321.

It can be written as a sum of positive squares in 2 ways, for example, as 6911594496 + 5419609924 = 83136^2 + 73618^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12331204391 and 12331204400.

It is not an unprimeable number, because it can be changed into a prime (12331204423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308280091 + ... + 308280130.

It is an arithmetic number, because the mean of its divisors is an integer number (2157960777).

Almost surely, 2^12331204420 is an apocalyptic number.

12331204420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12331204420 is an abundant number, since it is smaller than the sum of its proper divisors (13564324904).

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

12331204420 is a wasteful number, since it uses less digits than its factorization.

12331204420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616560230 (or 616560228 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 12331204420 its reverse (2440213321), we get a palindrome (14771417741).

The spelling of 12331204420 in words is "twelve billion, three hundred thirty-one million, two hundred four thousand, four hundred twenty".