1312311222163 has 2 divisors, whose sum is σ = 1312311222164. Its totient is φ = 1312311222162.

The previous prime is 1312311222149. The next prime is 1312311222191. The reversal of 1312311222163 is 3612221132131.

It is an a-pointer prime, because the next prime (1312311222191) can be obtained adding 1312311222163 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312311222163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312311220163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656155611081 + 656155611082.

It is an arithmetic number, because the mean of its divisors is an integer number (656155611082).

Almost surely, 2^{1312311222163} is an apocalyptic number.

1312311222163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312311222163 is an equidigital number, since it uses as much as digits as its factorization.

1312311222163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

Adding to 1312311222163 its reverse (3612221132131), we get a palindrome (4924532354294).

The spelling of 1312311222163 in words is "one trillion, three hundred twelve billion, three hundred eleven million, two hundred twenty-two thousand, one hundred sixty-three".