312223221321 has 48 divisors (see below), whose sum is σ = 469437608640. Its totient is φ = 184346870400.

The previous prime is 312223221301. The next prime is 312223221347. The reversal of 312223221321 is 123122322213.

It is a de Polignac number, because none of the positive numbers 2^k-312223221321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312223221291 and 312223221300.

It is not an unprimeable number, because it can be changed into a prime (312223221301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6046191 + ... + 6097611.

It is an arithmetic number, because the mean of its divisors is an integer number (9779950180).

Almost surely, 2^312223221321 is an apocalyptic number.

It is an amenable number.

312223221321 is a deficient number, since it is larger than the sum of its proper divisors (157214387319).

312223221321 is a wasteful number, since it uses less digits than its factorization.

312223221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51878 (or 51867 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 312223221321 its reverse (123122322213), we get a palindrome (435345543534).

The spelling of 312223221321 in words is "three hundred twelve billion, two hundred twenty-three million, two hundred twenty-one thousand, three hundred twenty-one".