1212311676647 has 2 divisors, whose sum is σ = 1212311676648. Its totient is φ = 1212311676646.

The previous prime is 1212311676629. The next prime is 1212311676671. The reversal of 1212311676647 is 7466761132121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212311676647 - 2²⁶ = 1212244567783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212311676617) 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 as a sum of consecutive naturals, namely, 606155838323 + 606155838324.

It is an arithmetic number, because the mean of its divisors is an integer number (606155838324).

Almost surely, 2^{1212311676647} is an apocalyptic number.

1212311676647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212311676647 is an equidigital number, since it uses as much as digits as its factorization.

1212311676647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The spelling of 1212311676647 in words is "one trillion, two hundred twelve billion, three hundred eleven million, six hundred seventy-six thousand, six hundred forty-seven".