12000232121 has 4 divisors (see below), whose sum is σ = 12000470244. Its totient is φ = 11999994000.

The previous prime is 12000232099. The next prime is 12000232169. The reversal of 12000232121 is 12123200021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9261175225 + 2739056896 = 96235^2 + 52336^2 .

It is a cyclic number.

It is not a de Polignac number, because 12000232121 - 2¹⁰ = 12000231097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000232096 and 12000232105.

It is not an unprimeable number, because it can be changed into a prime (12000232421) 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, 10430 + ... + 155271.

It is an arithmetic number, because the mean of its divisors is an integer number (3000117561).

Almost surely, 2^12000232121 is an apocalyptic number.

It is an amenable number.

12000232121 is a deficient number, since it is larger than the sum of its proper divisors (238123).

12000232121 is an equidigital number, since it uses as much as digits as its factorization.

12000232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238122.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12000232121 its reverse (12123200021), we get a palindrome (24123432142).

The spelling of 12000232121 in words is "twelve billion, two hundred thirty-two thousand, one hundred twenty-one".