312023033311721 has 2 divisors, whose sum is σ = 312023033311722. Its totient is φ = 312023033311720.

The previous prime is 312023033311711. The next prime is 312023033311747. The reversal of 312023033311721 is 127113330320213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197024455171600 + 114998578140121 = 14036540^2 + 10723739^2 .

It is a cyclic number.

It is not a de Polignac number, because 312023033311721 - 2¹⁸ = 312023033049577 is a prime.

It is not a weakly prime, because it can be changed into another prime (312023033311711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156011516655860 + 156011516655861.

It is an arithmetic number, because the mean of its divisors is an integer number (156011516655861).

Almost surely, 2^{312023033311721} is an apocalyptic number.

It is an amenable number.

312023033311721 is a deficient number, since it is larger than the sum of its proper divisors (1).

312023033311721 is an equidigital number, since it uses as much as digits as its factorization.

312023033311721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 32.

Adding to 312023033311721 its reverse (127113330320213), we get a palindrome (439136363631934).

The spelling of 312023033311721 in words is "three hundred twelve trillion, twenty-three billion, thirty-three million, three hundred eleven thousand, seven hundred twenty-one".