12120331420 has 24 divisors (see below), whose sum is σ = 26792312400. Its totient is φ = 4592967552.

The previous prime is 12120331337. The next prime is 12120331429. The reversal of 12120331420 is 2413302121.

It is a happy number.

12120331420 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 (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120331429) 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, 15947425 + ... + 15948184.

It is an arithmetic number, because the mean of its divisors is an integer number (1116346350).

Almost surely, 2^12120331420 is an apocalyptic number.

12120331420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120331420 is an abundant number, since it is smaller than the sum of its proper divisors (14671980980).

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

12120331420 is a wasteful number, since it uses less digits than its factorization.

12120331420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31895637 (or 31895635 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12120331420 its reverse (2413302121), we get a palindrome (14533633541).

The spelling of 12120331420 in words is "twelve billion, one hundred twenty million, three hundred thirty-one thousand, four hundred twenty".