312512112521 has 16 divisors (see below), whose sum is σ = 366255593088. Its totient is φ = 261070387200.

The previous prime is 312512112401. The next prime is 312512112533. The reversal of 312512112521 is 125211215213.

It is not a de Polignac number, because 312512112521 - 2³⁸ = 37634205577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312512112551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 987320 + ... + 1264841.

It is an arithmetic number, because the mean of its divisors is an integer number (22890974568).

Almost surely, 2^312512112521 is an apocalyptic number.

It is an amenable number.

312512112521 is a deficient number, since it is larger than the sum of its proper divisors (53743480567).

312512112521 is a wasteful number, since it uses less digits than its factorization.

312512112521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252672.

The product of its digits is 1200, while the sum is 26.

Adding to 312512112521 its reverse (125211215213), we get a palindrome (437723327734).

The spelling of 312512112521 in words is "three hundred twelve billion, five hundred twelve million, one hundred twelve thousand, five hundred twenty-one".