12321403043 has 16 divisors (see below), whose sum is σ = 13429152000. Its totient is φ = 11260301472.

The previous prime is 12321403027. The next prime is 12321403057. The reversal of 12321403043 is 34030412321.

It is a cyclic number.

It is not a de Polignac number, because 12321403043 - 2⁴ = 12321403027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12321403543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644618 + ... + 663456.

It is an arithmetic number, because the mean of its divisors is an integer number (839322000).

Almost surely, 2^12321403043 is an apocalyptic number.

12321403043 is a deficient number, since it is larger than the sum of its proper divisors (1107748957).

12321403043 is a wasteful number, since it uses less digits than its factorization.

12321403043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20074.

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

Adding to 12321403043 its reverse (34030412321), we get a palindrome (46351815364).

The spelling of 12321403043 in words is "twelve billion, three hundred twenty-one million, four hundred three thousand, forty-three".