12312223303221 has 12 divisors (see below), whose sum is σ = 18397575051180. Its totient is φ = 7925109252480.

The previous prime is 12312223303213. The next prime is 12312223303267. The reversal of 12312223303221 is 12230332221321.

12312223303221 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 2 + 2 + 2 + 330 + 322 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4473707232996 + 7838516070225 = 2115114^2 + 2799735^2 .

It is not a de Polignac number, because 12312223303221 - 2³ = 12312223303213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312223303921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23586634420 + ... + 23586634941.

It is an arithmetic number, because the mean of its divisors is an integer number (1533131254265).

Almost surely, 2^{12312223303221} is an apocalyptic number.

It is an amenable number.

12312223303221 is a deficient number, since it is larger than the sum of its proper divisors (6085351747959).

12312223303221 is a wasteful number, since it uses less digits than its factorization.

12312223303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47173269396 (or 47173269393 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 12312223303221 its reverse (12230332221321), we get a palindrome (24542555524542).

The spelling of 12312223303221 in words is "twelve trillion, three hundred twelve billion, two hundred twenty-three million, three hundred three thousand, two hundred twenty-one".