312231303221 has 8 divisors (see below), whose sum is σ = 316293922560. Its totient is φ = 308190467952.

The previous prime is 312231303191. The next prime is 312231303271. The reversal of 312231303221 is 122303132213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312231303221 is a prime.

It is a super-2 number, since 2×312231303221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312231303271) 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 7 ways as a sum of consecutive naturals, for example, 5417165 + ... + 5474498.

It is an arithmetic number, because the mean of its divisors is an integer number (39536740320).

Almost surely, 2^312231303221 is an apocalyptic number.

It is an amenable number.

312231303221 is a deficient number, since it is larger than the sum of its proper divisors (4062619339).

312231303221 is a wasteful number, since it uses less digits than its factorization.

312231303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10892035.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 312231303221 its reverse (122303132213), we get a palindrome (434534435434).

The spelling of 312231303221 in words is "three hundred twelve billion, two hundred thirty-one million, three hundred three thousand, two hundred twenty-one".