12400321412 has 12 divisors (see below), whose sum is σ = 21703373916. Its totient is φ = 6199357440.

The previous prime is 12400321399. The next prime is 12400321433. The reversal of 12400321412 is 21412300421.

12400321412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6180475456 + 6219845956 = 78616^2 + 78866^2 .

It is a super-2 number, since 2×12400321412² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165389 + ... + 228372.

It is an arithmetic number, because the mean of its divisors is an integer number (1808614493).

Almost surely, 2^12400321412 is an apocalyptic number.

It is an amenable number.

12400321412 is a deficient number, since it is larger than the sum of its proper divisors (9303052504).

12400321412 is a wasteful number, since it uses less digits than its factorization.

12400321412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401638 (or 401636 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12400321412 its reverse (21412300421), we get a palindrome (33812621833).

The spelling of 12400321412 in words is "twelve billion, four hundred million, three hundred twenty-one thousand, four hundred twelve".