312144320321 has 4 divisors (see below), whose sum is σ = 312145489092. Its totient is φ = 312143151552.

The previous prime is 312144320273. The next prime is 312144320357. The reversal of 312144320321 is 123023441213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 240135281296 + 72009039025 = 490036^2 + 268345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312144320321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312144320381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35165 + ... + 790901.

It is an arithmetic number, because the mean of its divisors is an integer number (78036372273).

Almost surely, 2^312144320321 is an apocalyptic number.

It is an amenable number.

312144320321 is a deficient number, since it is larger than the sum of its proper divisors (1168771).

312144320321 is an equidigital number, since it uses as much as digits as its factorization.

312144320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168770.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 312144320321 its reverse (123023441213), we get a palindrome (435167761534).

The spelling of 312144320321 in words is "three hundred twelve billion, one hundred forty-four million, three hundred twenty thousand, three hundred twenty-one".