12400334321 has 2 divisors, whose sum is σ = 12400334322. Its totient is φ = 12400334320.

The previous prime is 12400334291. The next prime is 12400334383. The reversal of 12400334321 is 12343300421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9843616225 + 2556718096 = 99215^2 + 50564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12400334321 - 2²² = 12396140017 is a prime.

It is not a weakly prime, because it can be changed into another prime (12400354321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200167160 + 6200167161.

It is an arithmetic number, because the mean of its divisors is an integer number (6200167161).

Almost surely, 2^12400334321 is an apocalyptic number.

It is an amenable number.

12400334321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400334321 is an equidigital number, since it uses as much as digits as its factorization.

12400334321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 12400334321 its reverse (12343300421), we get a palindrome (24743634742).

The spelling of 12400334321 in words is "twelve billion, four hundred million, three hundred thirty-four thousand, three hundred twenty-one".