12400112321 has 2 divisors, whose sum is σ = 12400112322. Its totient is φ = 12400112320.

The previous prime is 12400112311. The next prime is 12400112323. The reversal of 12400112321 is 12321100421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10513426225 + 1886686096 = 102535^2 + 43436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12400112321 is a prime.

Together with 12400112323, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12400112321.

It is not a weakly prime, because it can be changed into another prime (12400112323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200056160 + 6200056161.

It is an arithmetic number, because the mean of its divisors is an integer number (6200056161).

Almost surely, 2^12400112321 is an apocalyptic number.

It is an amenable number.

12400112321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400112321 is an equidigital number, since it uses as much as digits as its factorization.

12400112321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12400112321 its reverse (12321100421), we get a palindrome (24721212742).

The spelling of 12400112321 in words is "twelve billion, four hundred million, one hundred twelve thousand, three hundred twenty-one".