12131200420 has 24 divisors (see below), whose sum is σ = 26067976704. Its totient is φ = 4739631456.

The previous prime is 12131200387. The next prime is 12131200423. The reversal of 12131200420 is 2400213121.

12131200420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12131200394 and 12131200403.

It is not an unprimeable number, because it can be changed into a prime (12131200423) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7052164 + ... + 7053883.

It is an arithmetic number, because the mean of its divisors is an integer number (1086165696).

Almost surely, 2^12131200420 is an apocalyptic number.

12131200420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131200420 is an abundant number, since it is smaller than the sum of its proper divisors (13936776284).

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

12131200420 is a wasteful number, since it uses less digits than its factorization.

12131200420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14106099 (or 14106097 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12131200420 its reverse (2400213121), we get a palindrome (14531413541).

The spelling of 12131200420 in words is "twelve billion, one hundred thirty-one million, two hundred thousand, four hundred twenty".