12321341021 has 4 divisors (see below), whose sum is σ = 13441462944. Its totient is φ = 11201219100.

The previous prime is 12321341009. The next prime is 12321341023. The reversal of 12321341021 is 12014312321.

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 12321341021 - 2⁶ = 12321340957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12321340984 and 12321341002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321341023) 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, 560060945 + ... + 560060966.

It is an arithmetic number, because the mean of its divisors is an integer number (3360365736).

Almost surely, 2^12321341021 is an apocalyptic number.

12321341021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12321341021 is a deficient number, since it is larger than the sum of its proper divisors (1120121923).

12321341021 is a wasteful number, since it uses less digits than its factorization.

12321341021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120121922.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12321341021 its reverse (12014312321), we get a palindrome (24335653342).

The spelling of 12321341021 in words is "twelve billion, three hundred twenty-one million, three hundred forty-one thousand, twenty-one".