1211155134107 has 2 divisors, whose sum is σ = 1211155134108. Its totient is φ = 1211155134106.

The previous prime is 1211155134071. The next prime is 1211155134209. The reversal of 1211155134107 is 7014315511121.

Together with previous prime (1211155134071) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211155134107 - 2³⁰ = 1210081392283 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211155134307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605577567053 + 605577567054.

It is an arithmetic number, because the mean of its divisors is an integer number (605577567054).

Almost surely, 2^{1211155134107} is an apocalyptic number.

1211155134107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211155134107 is an equidigital number, since it uses as much as digits as its factorization.

1211155134107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 32.

The spelling of 1211155134107 in words is "one trillion, two hundred eleven billion, one hundred fifty-five million, one hundred thirty-four thousand, one hundred seven".