12342400421 has 8 divisors (see below), whose sum is σ = 13292874840. Its totient is φ = 11392077312.

The previous prime is 12342400417. The next prime is 12342400439. The reversal of 12342400421 is 12400424321.

It can be written as a sum of positive squares in 4 ways, for example, as 178516321 + 12163884100 = 13361^2 + 110290^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12342400421 - 2² = 12342400417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12342400451) 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 7 ways as a sum of consecutive naturals, for example, 176681 + ... + 236433.

It is an arithmetic number, because the mean of its divisors is an integer number (1661609355).

Almost surely, 2^12342400421 is an apocalyptic number.

It is an amenable number.

12342400421 is a deficient number, since it is larger than the sum of its proper divisors (950474419).

12342400421 is a wasteful number, since it uses less digits than its factorization.

12342400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75655.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12342400421 its reverse (12400424321), we get a palindrome (24742824742).

The spelling of 12342400421 in words is "twelve billion, three hundred forty-two million, four hundred thousand, four hundred twenty-one".