311212112125 has 16 divisors (see below), whose sum is σ = 388534841136. Its totient is φ = 248878584000.

The previous prime is 311212112087. The next prime is 311212112153. The reversal of 311212112125 is 521211212113.

It can be written as a sum of positive squares in 8 ways, for example, as 196711764484 + 114500347641 = 443522^2 + 338379^2 .

It is not a de Polignac number, because 311212112125 - 2¹⁵ = 311212079357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311212112096 and 311212112105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111534 + ... + 796783.

It is an arithmetic number, because the mean of its divisors is an integer number (24283427571).

Almost surely, 2^311212112125 is an apocalyptic number.

It is an amenable number.

311212112125 is a deficient number, since it is larger than the sum of its proper divisors (77322729011).

311212112125 is an equidigital number, since it uses as much as digits as its factorization.

311212112125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911073 (or 911063 counting only the distinct ones).

The product of its digits is 240, while the sum is 22.

Adding to 311212112125 its reverse (521211212113), we get a palindrome (832423324238).

The spelling of 311212112125 in words is "three hundred eleven billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty-five".