1211351842163 has 2 divisors, whose sum is σ = 1211351842164. Its totient is φ = 1211351842162.

The previous prime is 1211351842159. The next prime is 1211351842171. The reversal of 1211351842163 is 3612481531121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211351842163 - 2² = 1211351842159 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211351842193) 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, 605675921081 + 605675921082.

It is an arithmetic number, because the mean of its divisors is an integer number (605675921082).

Almost surely, 2^{1211351842163} is an apocalyptic number.

1211351842163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211351842163 is an equidigital number, since it uses as much as digits as its factorization.

1211351842163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The spelling of 1211351842163 in words is "one trillion, two hundred eleven billion, three hundred fifty-one million, eight hundred forty-two thousand, one hundred sixty-three".