12130421 has 4 divisors (see below), whose sum is σ = 12301344. Its totient is φ = 11959500.

The previous prime is 12130411. The next prime is 12130441. The reversal of 12130421 is 12403121.

12130421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12130421 - 2⁶ = 12130357 is a prime.

It is a super-2 number, since 2×12130421² = 294294227274482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12130396 and 12130405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12130411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85355 + ... + 85496.

It is an arithmetic number, because the mean of its divisors is an integer number (3075336).

Almost surely, 2^12130421 is an apocalyptic number.

It is an amenable number.

12130421 is a deficient number, since it is larger than the sum of its proper divisors (170923).

12130421 is an equidigital number, since it uses as much as digits as its factorization.

12130421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170922.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 12130421 is about 3482.8753925456. The cubic root of 12130421 is about 229.7692771360.

Adding to 12130421 its reverse (12403121), we get a palindrome (24533542).

The spelling of 12130421 in words is "twelve million, one hundred thirty thousand, four hundred twenty-one".