12120302421 has 12 divisors (see below), whose sum is σ = 17509429548. Its totient is φ = 8079128064.

The previous prime is 12120302377. The next prime is 12120302429. The reversal of 12120302421 is 12420302121.

It is a happy number.

12120302421 is a `hidden beast` number, since 1 + 212 + 0 + 30 + 2 + 421 = 666.

12120302421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6478640100 + 5641662321 = 80490^2 + 75111^2 .

It is not a de Polignac number, because 12120302421 - 2²¹ = 12118205269 is a prime.

It is a super-2 number, since 2×12120302421² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12120302394 and 12120302403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120302429) 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 11 ways as a sum of consecutive naturals, for example, 14670 + ... + 156383.

It is an arithmetic number, because the mean of its divisors is an integer number (1459119129).

Almost surely, 2^12120302421 is an apocalyptic number.

It is an amenable number.

12120302421 is a deficient number, since it is larger than the sum of its proper divisors (5389127127).

12120302421 is a wasteful number, since it uses less digits than its factorization.

12120302421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178932 (or 178929 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12120302421 its reverse (12420302121), we get a palindrome (24540604542).

The spelling of 12120302421 in words is "twelve billion, one hundred twenty million, three hundred two thousand, four hundred twenty-one".