312001112121 has 4 divisors (see below), whose sum is σ = 416001482832. Its totient is φ = 208000741412.

The previous prime is 312001112119. The next prime is 312001112141. The reversal of 312001112121 is 121211100213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312001112121 - 2¹ = 312001112119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312001112121.

It is not an unprimeable number, because it can be changed into a prime (312001112141) 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 3 ways as a sum of consecutive naturals, for example, 52000185351 + ... + 52000185356.

It is an arithmetic number, because the mean of its divisors is an integer number (104000370708).

Almost surely, 2^312001112121 is an apocalyptic number.

It is an amenable number.

312001112121 is a deficient number, since it is larger than the sum of its proper divisors (104000370711).

312001112121 is a wasteful number, since it uses less digits than its factorization.

312001112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104000370710.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 312001112121 its reverse (121211100213), we get a palindrome (433212212334).

The spelling of 312001112121 in words is "three hundred twelve billion, one million, one hundred twelve thousand, one hundred twenty-one".