12113421 has 4 divisors (see below), whose sum is σ = 16151232. Its totient is φ = 8075612.

The previous prime is 12113417. The next prime is 12113443. The reversal of 12113421 is 12431121.

12113421 is digitally balanced in base 2 and base 4, because in such bases 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, and also an emirpimes, since its reverse is a distinct semiprime: 12431121 = 3 ⋅4143707.

It is a cyclic number.

It is not a de Polignac number, because 12113421 - 2² = 12113417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12113421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12113471) 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, 2018901 + ... + 2018906.

It is an arithmetic number, because the mean of its divisors is an integer number (4037808).

Almost surely, 2^12113421 is an apocalyptic number.

It is an amenable number.

12113421 is a deficient number, since it is larger than the sum of its proper divisors (4037811).

12113421 is an equidigital number, since it uses as much as digits as its factorization.

12113421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037810.

The product of its digits is 48, while the sum is 15.

The square root of 12113421 is about 3480.4340246584. The cubic root of 12113421 is about 229.6618913649.

Adding to 12113421 its reverse (12431121), we get a palindrome (24544542).

The spelling of 12113421 in words is "twelve million, one hundred thirteen thousand, four hundred twenty-one".