12121310121 has 8 divisors (see below), whose sum is σ = 16243786944. Its totient is φ = 8039853360.

The previous prime is 12121310111. The next prime is 12121310143. The reversal of 12121310121 is 12101312121.

12121310121 is digitally balanced in base 2, because in such base 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 not a de Polignac number, because 12121310121 - 2⁶ = 12121310057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12121310121.

It is not an unprimeable number, because it can be changed into a prime (12121310111) 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 7 ways as a sum of consecutive naturals, for example, 10254325 + ... + 10255506.

It is an arithmetic number, because the mean of its divisors is an integer number (2030473368).

Almost surely, 2^12121310121 is an apocalyptic number.

It is an amenable number.

12121310121 is a deficient number, since it is larger than the sum of its proper divisors (4122476823).

12121310121 is a wasteful number, since it uses less digits than its factorization.

12121310121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20510031.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12121310121 its reverse (12101312121), we get a palindrome (24222622242).

The spelling of 12121310121 in words is "twelve billion, one hundred twenty-one million, three hundred ten thousand, one hundred twenty-one".