12003122121 has 8 divisors (see below), whose sum is σ = 16006267584. Its totient is φ = 8001029040.

The previous prime is 12003122113. The next prime is 12003122137. The reversal of 12003122121 is 12122130021.

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

It is not a de Polignac number, because 12003122121 - 2³ = 12003122113 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 12003122121.

It is not an unprimeable number, because it can be changed into a prime (12003122141) 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, 236085 + ... + 282386.

It is an arithmetic number, because the mean of its divisors is an integer number (2000783448).

Almost surely, 2^12003122121 is an apocalyptic number.

It is an amenable number.

12003122121 is a deficient number, since it is larger than the sum of its proper divisors (4003145463).

12003122121 is an equidigital number, since it uses as much as digits as its factorization.

12003122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526191.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12003122121 its reverse (12122130021), we get a palindrome (24125252142).

The spelling of 12003122121 in words is "twelve billion, three million, one hundred twenty-two thousand, one hundred twenty-one".