12344403421 has 4 divisors (see below), whose sum is σ = 14107889632. Its totient is φ = 10580917212.

The previous prime is 12344403403. The next prime is 12344403473. The reversal of 12344403421 is 12430444321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12344403421 - 2⁵ = 12344403389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12344403421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12344403481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881743095 + ... + 881743108.

It is an arithmetic number, because the mean of its divisors is an integer number (3526972408).

Almost surely, 2^12344403421 is an apocalyptic number.

It is an amenable number.

12344403421 is a deficient number, since it is larger than the sum of its proper divisors (1763486211).

12344403421 is an equidigital number, since it uses as much as digits as its factorization.

12344403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763486210.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 12344403421 its reverse (12430444321), we get a palindrome (24774847742).

The spelling of 12344403421 in words is "twelve billion, three hundred forty-four million, four hundred three thousand, four hundred twenty-one".