12343340921 has 2 divisors, whose sum is σ = 12343340922. Its totient is φ = 12343340920.

The previous prime is 12343340917. The next prime is 12343340929. The reversal of 12343340921 is 12904334321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11169319225 + 1174021696 = 105685^2 + 34264^2 .

It is a cyclic number.

It is not a de Polignac number, because 12343340921 - 2² = 12343340917 is a prime.

It is not a weakly prime, because it can be changed into another prime (12343340929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6171670460 + 6171670461.

It is an arithmetic number, because the mean of its divisors is an integer number (6171670461).

Almost surely, 2^12343340921 is an apocalyptic number.

It is an amenable number.

12343340921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12343340921 is an equidigital number, since it uses as much as digits as its factorization.

12343340921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 12343340921 in words is "twelve billion, three hundred forty-three million, three hundred forty thousand, nine hundred twenty-one".