12020324421 has 32 divisors (see below), whose sum is σ = 18879980800. Its totient is φ = 6658868736.

The previous prime is 12020324399. The next prime is 12020324441. The reversal of 12020324421 is 12442302021.

12020324421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12020324421 - 2¹³ = 12020316229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020324441) 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 31 ways as a sum of consecutive naturals, for example, 187305 + ... + 243153.

It is an arithmetic number, because the mean of its divisors is an integer number (589999400).

Almost surely, 2^12020324421 is an apocalyptic number.

It is an amenable number.

12020324421 is a deficient number, since it is larger than the sum of its proper divisors (6859656379).

12020324421 is a wasteful number, since it uses less digits than its factorization.

12020324421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56173.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 12020324421 its reverse (12442302021), we get a palindrome (24462626442).

The spelling of 12020324421 in words is "twelve billion, twenty million, three hundred twenty-four thousand, four hundred twenty-one".