12138284121 has 64 divisors (see below), whose sum is σ = 18753638400. Its totient is φ = 6934035456.

The previous prime is 12138284113. The next prime is 12138284141. The reversal of 12138284121 is 12148283121.

It is not a de Polignac number, because 12138284121 - 2³ = 12138284113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12138284141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2973760 + ... + 2977838.

It is an arithmetic number, because the mean of its divisors is an integer number (293025600).

Almost surely, 2^12138284121 is an apocalyptic number.

It is an amenable number.

12138284121 is a deficient number, since it is larger than the sum of its proper divisors (6615354279).

12138284121 is a wasteful number, since it uses less digits than its factorization.

12138284121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238.

The product of its digits is 6144, while the sum is 33.

The spelling of 12138284121 in words is "twelve billion, one hundred thirty-eight million, two hundred eighty-four thousand, one hundred twenty-one".