12312212321 has 8 divisors (see below), whose sum is σ = 12501209760. Its totient is φ = 12123368928.

The previous prime is 12312212267. The next prime is 12312212351. The reversal of 12312212321 is 12321221321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12312212321 - 2⁶ = 12312212257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312212293 and 12312212302.

It is not an unprimeable number, because it can be changed into a prime (12312212351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128045 + ... + 202533.

It is an arithmetic number, because the mean of its divisors is an integer number (1562651220).

Almost surely, 2^12312212321 is an apocalyptic number.

It is an amenable number.

12312212321 is a deficient number, since it is larger than the sum of its proper divisors (188997439).

12312212321 is an equidigital number, since it uses as much as digits as its factorization.

12312212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77023.

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

Adding to 12312212321 its reverse (12321221321), we get a palindrome (24633433642).

The spelling of 12312212321 in words is "twelve billion, three hundred twelve million, two hundred twelve thousand, three hundred twenty-one".