12130121 has 4 divisors (see below), whose sum is σ = 12138000. Its totient is φ = 12122244.

The previous prime is 12130109. The next prime is 12130159. The reversal of 12130121 is 12103121.

12130121 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12130121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12130621) 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, 791 + ... + 4988.

It is an arithmetic number, because the mean of its divisors is an integer number (3034500).

Almost surely, 2^12130121 is an apocalyptic number.

It is an amenable number.

12130121 is a deficient number, since it is larger than the sum of its proper divisors (7879).

12130121 is an equidigital number, since it uses as much as digits as its factorization.

12130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7878.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12130121 is about 3482.8323244164. The cubic root of 12130121 is about 229.7673829629.

Adding to 12130121 its reverse (12103121), we get a palindrome (24233242).

Subtracting from 12130121 its reverse (12103121), we obtain a cube (27000 = 30³).

The spelling of 12130121 in words is "twelve million, one hundred thirty thousand, one hundred twenty-one".