312123101213 has 32 divisors (see below), whose sum is σ = 394956337152. Its totient is φ = 239602406400.

The previous prime is 312123101159. The next prime is 312123101219. The reversal of 312123101213 is 312101321213.

It is a happy number.

It is not a de Polignac number, because 312123101213 - 2⁸ = 312123100957 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 (312123101219) 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 31 ways as a sum of consecutive naturals, for example, 1428728 + ... + 1632638.

It is an arithmetic number, because the mean of its divisors is an integer number (12342385536).

Almost surely, 2^312123101213 is an apocalyptic number.

It is an amenable number.

312123101213 is a deficient number, since it is larger than the sum of its proper divisors (82833235939).

312123101213 is a wasteful number, since it uses less digits than its factorization.

312123101213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204225.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 312123101213 its reverse (312101321213), we get a palindrome (624224422426).

The spelling of 312123101213 in words is "three hundred twelve billion, one hundred twenty-three million, one hundred one thousand, two hundred thirteen".