1211351242163 has 2 divisors, whose sum is σ = 1211351242164. Its totient is φ = 1211351242162.

The previous prime is 1211351242141. The next prime is 1211351242177. The reversal of 1211351242163 is 3612421531121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211351242163 - 2³⁸ = 936473335219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211351842163) 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, 605675621081 + 605675621082.

It is an arithmetic number, because the mean of its divisors is an integer number (605675621082).

Almost surely, 2^{1211351242163} is an apocalyptic number.

1211351242163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211351242163 is an equidigital number, since it uses as much as digits as its factorization.

1211351242163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

Adding to 1211351242163 its reverse (3612421531121), we get a palindrome (4823772773284).

The spelling of 1211351242163 in words is "one trillion, two hundred eleven billion, three hundred fifty-one million, two hundred forty-two thousand, one hundred sixty-three".