312201112009 has 4 divisors (see below), whose sum is σ = 312221139220. Its totient is φ = 312181084800.

The previous prime is 312201111979. The next prime is 312201112061. The reversal of 312201112009 is 900211102213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900211102213 = 3169 ⋅284067877.

It can be written as a sum of positive squares in 2 ways, for example, as 173891502009 + 138309610000 = 417003^2 + 371900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312201112009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312201112109) 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, 9990204 + ... + 10021405.

It is an arithmetic number, because the mean of its divisors is an integer number (78055284805).

Almost surely, 2^312201112009 is an apocalyptic number.

It is an amenable number.

312201112009 is a deficient number, since it is larger than the sum of its proper divisors (20027211).

312201112009 is a wasteful number, since it uses less digits than its factorization.

312201112009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20027210.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 312201112009 in words is "three hundred twelve billion, two hundred one million, one hundred twelve thousand, nine".