12321212321 has 12 divisors (see below), whose sum is σ = 14255950800. Its totient is φ = 10611568440.

The previous prime is 12321212287. The next prime is 12321212329.

12321212321 is nontrivially palindromic in base 10.

12321212321 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 12321212321 - 2⁶ = 12321212257 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 12321212293 and 12321212302.

It is not an unprimeable number, because it can be changed into a prime (12321212329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2677391 + ... + 2681988.

It is an arithmetic number, because the mean of its divisors is an integer number (1187995900).

Almost surely, 2^12321212321 is an apocalyptic number.

12321212321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12321212321 is a deficient number, since it is larger than the sum of its proper divisors (1934738479).

12321212321 is a wasteful number, since it uses less digits than its factorization.

12321212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359420 (or 5359409 counting only the distinct ones).

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

The spelling of 12321212321 in words is "twelve billion, three hundred twenty-one million, two hundred twelve thousand, three hundred twenty-one".