12131121 has 8 divisors (see below), whose sum is σ = 16569504. Its totient is φ = 7890080.

The previous prime is 12131113. The next prime is 12131159. The reversal of 12131121 is 12113121.

12131121 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 sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12131121 - 2³ = 12131113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12131097 and 12131106.

It is not an unprimeable number, because it can be changed into a prime (12131321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49191 + ... + 49436.

It is an arithmetic number, because the mean of its divisors is an integer number (2071188).

Almost surely, 2^12131121 is an apocalyptic number.

It is an amenable number.

12131121 is a deficient number, since it is larger than the sum of its proper divisors (4438383).

12131121 is an equidigital number, since it uses as much as digits as its factorization.

12131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98671.

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

The square root of 12131121 is about 3482.9758827761. The cubic root of 12131121 is about 229.7736967518.

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

The spelling of 12131121 in words is "twelve million, one hundred thirty-one thousand, one hundred twenty-one".