312126144013 has 4 divisors (see below), whose sum is σ = 317242966108. Its totient is φ = 307009321920.

The previous prime is 312126143977. The next prime is 312126144017. The reversal of 312126144013 is 310441621213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310441621213 = 11443 ⋅27129391.

It can be written as a sum of positive squares in 2 ways, for example, as 34146235369 + 277979908644 = 184787^2 + 527238^2 .

It is a cyclic number.

It is not a de Polignac number, because 312126144013 - 2³⁷ = 174687190541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312126144017) 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 3 ways as a sum of consecutive naturals, for example, 2558410956 + ... + 2558411077.

It is an arithmetic number, because the mean of its divisors is an integer number (79310741527).

Almost surely, 2^312126144013 is an apocalyptic number.

It is an amenable number.

312126144013 is a deficient number, since it is larger than the sum of its proper divisors (5116822095).

312126144013 is an equidigital number, since it uses as much as digits as its factorization.

312126144013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116822094.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 312126144013 its reverse (310441621213), we get a palindrome (622567765226).

It can be divided in two parts, 31212 and 6144013, that added together give a square (6175225 = 2485²).

The spelling of 312126144013 in words is "three hundred twelve billion, one hundred twenty-six million, one hundred forty-four thousand, thirteen".