312212201113 has 2 divisors, whose sum is σ = 312212201114. Its totient is φ = 312212201112.

The previous prime is 312212201111. The next prime is 312212201117. The reversal of 312212201113 is 311102212213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269731693449 + 42480507664 = 519357^2 + 206108^2 .

It is a cyclic number.

It is not a de Polignac number, because 312212201113 - 2¹ = 312212201111 is a prime.

Together with 312212201111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (312212201111) 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 as a sum of consecutive naturals, namely, 156106100556 + 156106100557.

It is an arithmetic number, because the mean of its divisors is an integer number (156106100557).

Almost surely, 2^312212201113 is an apocalyptic number.

It is an amenable number.

312212201113 is a deficient number, since it is larger than the sum of its proper divisors (1).

312212201113 is an equidigital number, since it uses as much as digits as its factorization.

312212201113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 312212201113 its reverse (311102212213), we get a palindrome (623314413326).

The spelling of 312212201113 in words is "three hundred twelve billion, two hundred twelve million, two hundred one thousand, one hundred thirteen".