12132212420 has 48 divisors (see below), whose sum is σ = 26216483328. Its totient is φ = 4713219840.

The previous prime is 12132212419. The next prime is 12132212429. The reversal of 12132212420 is 2421223121.

12132212420 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 = 12132212392 and 12132212401.

It is not an unprimeable number, because it can be changed into a prime (12132212429) 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 15 ways as a sum of consecutive naturals, for example, 149687 + ... + 216033.

It is an arithmetic number, because the mean of its divisors is an integer number (546176736).

Almost surely, 2^12132212420 is an apocalyptic number.

12132212420 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 12132212420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13108241664).

12132212420 is an abundant number, since it is smaller than the sum of its proper divisors (14084270908).

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

12132212420 is a wasteful number, since it uses less digits than its factorization.

12132212420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66620 (or 66618 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12132212420 its reverse (2421223121), we get a palindrome (14553435541).

The spelling of 12132212420 in words is "twelve billion, one hundred thirty-two million, two hundred twelve thousand, four hundred twenty".