312112121 has 8 divisors (see below), whose sum is σ = 317247840. Its totient is φ = 307009312.

The previous prime is 312112109. The next prime is 312112159. The reversal of 312112121 is 121211213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312112121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312112096 and 312112105.

It is not an unprimeable number, because it can be changed into a prime (312112421) 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 7 ways as a sum of consecutive naturals, for example, 11270 + ... + 27408.

It is an arithmetic number, because the mean of its divisors is an integer number (39655980).

Almost surely, 2^312112121 is an apocalyptic number.

It is an amenable number.

312112121 is a deficient number, since it is larger than the sum of its proper divisors (5135719).

312112121 is a wasteful number, since it uses less digits than its factorization.

312112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16455.

The product of its digits is 24, while the sum is 14.

The square root of 312112121 is about 17666.6952484046. The cubic root of 312112121 is about 678.3235237483.

Adding to 312112121 its reverse (121211213), we get a palindrome (433323334).

It can be divided in two parts, 31211212 and 1, that added together give a palindrome (31211213).

The spelling of 312112121 in words is "three hundred twelve million, one hundred twelve thousand, one hundred twenty-one".