12002113121 has 4 divisors (see below), whose sum is σ = 12008330544. Its totient is φ = 11995895700.

The previous prime is 12002113099. The next prime is 12002113127. The reversal of 12002113121 is 12131120021.

12002113121 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.

It is a cyclic number.

It is not a de Polignac number, because 12002113121 - 2¹⁰ = 12002112097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002113096 and 12002113105.

It is not an unprimeable number, because it can be changed into a prime (12002113127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3105815 + ... + 3109676.

It is an arithmetic number, because the mean of its divisors is an integer number (3002082636).

Almost surely, 2^12002113121 is an apocalyptic number.

It is an amenable number.

12002113121 is a deficient number, since it is larger than the sum of its proper divisors (6217423).

12002113121 is an equidigital number, since it uses as much as digits as its factorization.

12002113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6217422.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12002113121 its reverse (12131120021), we get a palindrome (24133233142).

The spelling of 12002113121 in words is "twelve billion, two million, one hundred thirteen thousand, one hundred twenty-one".