12130013121 has 4 divisors (see below), whose sum is σ = 16173350832. Its totient is φ = 8086675412.

The previous prime is 12130013089. The next prime is 12130013131. The reversal of 12130013121 is 12131003121.

It is a happy number.

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 12130013121 - 2⁵ = 12130013089 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12130013121.

It is not an unprimeable number, because it can be changed into a prime (12130013131) 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, 2021668851 + ... + 2021668856.

It is an arithmetic number, because the mean of its divisors is an integer number (4043337708).

Almost surely, 2^12130013121 is an apocalyptic number.

It is an amenable number.

12130013121 is a deficient number, since it is larger than the sum of its proper divisors (4043337711).

12130013121 is an equidigital number, since it uses as much as digits as its factorization.

12130013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043337710.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 12130013121 its reverse (12131003121), we get a palindrome (24261016242).

It can be divided in two parts, 121300 and 13121, that added together give a triangular number (134421 = T₅₁₈).

The spelling of 12130013121 in words is "twelve billion, one hundred thirty million, thirteen thousand, one hundred twenty-one".