12113121 has 4 divisors (see below), whose sum is σ = 16150832. Its totient is φ = 8075412.

The previous prime is 12113119. The next prime is 12113147. The reversal of 12113121 is 12131121.

12113121 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.

It is not a de Polignac number, because 12113121 - 2¹ = 12113119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12113097 and 12113106.

It is not an unprimeable number, because it can be changed into a prime (12113191) 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, 2018851 + ... + 2018856.

It is an arithmetic number, because the mean of its divisors is an integer number (4037708).

Almost surely, 2^12113121 is an apocalyptic number.

It is an amenable number.

12113121 is a deficient number, since it is larger than the sum of its proper divisors (4037711).

12113121 is an equidigital number, since it uses as much as digits as its factorization.

12113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037710.

The product of its digits is 12, while the sum is 12.

The square root of 12113121 is about 3480.3909263185. The cubic root of 12113121 is about 229.6599954200.

Adding to 12113121 its reverse (12131121), we get a palindrome (24244242).

The spelling of 12113121 in words is "twelve million, one hundred thirteen thousand, one hundred twenty-one".