312112550121 has 16 divisors (see below), whose sum is σ = 417144349440. Its totient is φ = 207578457680.

The previous prime is 312112550093. The next prime is 312112550129. The reversal of 312112550121 is 121055211213.

It is a cyclic number.

It is not a de Polignac number, because 312112550121 - 2⁵ = 312112550089 is a prime.

It is a super-2 number, since 2×312112550121² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 312112550091 and 312112550100.

It is not an unprimeable number, because it can be changed into a prime (312112550129) 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 15 ways as a sum of consecutive naturals, for example, 2165650 + ... + 2305268.

It is an arithmetic number, because the mean of its divisors is an integer number (26071521840).

Almost surely, 2^312112550121 is an apocalyptic number.

It is an amenable number.

312112550121 is a deficient number, since it is larger than the sum of its proper divisors (105031799319).

312112550121 is a wasteful number, since it uses less digits than its factorization.

312112550121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141396.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 312112550121 its reverse (121055211213), we get a palindrome (433167761334).

The spelling of 312112550121 in words is "three hundred twelve billion, one hundred twelve million, five hundred fifty thousand, one hundred twenty-one".