312343031431421 has 2 divisors, whose sum is σ = 312343031431422. Its totient is φ = 312343031431420.

The previous prime is 312343031431367. The next prime is 312343031431427. The reversal of 312343031431421 is 124134130343213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 289298903246521 + 23044128184900 = 17008789^2 + 4800430^2 .

It is a cyclic number.

It is not a de Polignac number, because 312343031431421 - 2³⁴ = 312325851562237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312343031431427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156171515715710 + 156171515715711.

It is an arithmetic number, because the mean of its divisors is an integer number (156171515715711).

Almost surely, 2^{312343031431421} is an apocalyptic number.

It is an amenable number.

312343031431421 is a deficient number, since it is larger than the sum of its proper divisors (1).

312343031431421 is an equidigital number, since it uses as much as digits as its factorization.

312343031431421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 35.

Adding to 312343031431421 its reverse (124134130343213), we get a palindrome (436477161774634).

The spelling of 312343031431421 in words is "three hundred twelve trillion, three hundred forty-three billion, thirty-one million, four hundred thirty-one thousand, four hundred twenty-one".