12343320021 has 16 divisors (see below), whose sum is σ = 16679260800. Its totient is φ = 8118536448.

The previous prime is 12343319981. The next prime is 12343320023. The reversal of 12343320021 is 12002334321.

It is not a de Polignac number, because 12343320021 - 2¹⁰ = 12343318997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12343320021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12343320023) 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, 71440 + ... + 172598.

It is an arithmetic number, because the mean of its divisors is an integer number (1042453800).

Almost surely, 2^12343320021 is an apocalyptic number.

It is an amenable number.

12343320021 is a deficient number, since it is larger than the sum of its proper divisors (4335940779).

12343320021 is a wasteful number, since it uses less digits than its factorization.

12343320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101708.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 12343320021 its reverse (12002334321), we get a palindrome (24345654342).

The spelling of 12343320021 in words is "twelve billion, three hundred forty-three million, three hundred twenty thousand, twenty-one".