312012343243 has 2 divisors, whose sum is σ = 312012343244. Its totient is φ = 312012343242.

The previous prime is 312012343217. The next prime is 312012343277. The reversal of 312012343243 is 342343210213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312012343243 - 2²¹ = 312010246091 is a prime.

It is not a weakly prime, because it can be changed into another prime (312012343283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156006171621 + 156006171622.

It is an arithmetic number, because the mean of its divisors is an integer number (156006171622).

Almost surely, 2^312012343243 is an apocalyptic number.

312012343243 is a deficient number, since it is larger than the sum of its proper divisors (1).

312012343243 is an equidigital number, since it uses as much as digits as its factorization.

312012343243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 312012343243 its reverse (342343210213), we get a palindrome (654355553456).

The spelling of 312012343243 in words is "three hundred twelve billion, twelve million, three hundred forty-three thousand, two hundred forty-three".