1211122110089 has 2 divisors, whose sum is σ = 1211122110090. Its totient is φ = 1211122110088.

The previous prime is 1211122110047. The next prime is 1211122110137. The reversal of 1211122110089 is 9800112211121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 633990175225 + 577131934864 = 796235^2 + 759692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211122110089 - 2²⁸ = 1210853674633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211122010089) 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, 605561055044 + 605561055045.

It is an arithmetic number, because the mean of its divisors is an integer number (605561055045).

Almost surely, 2^{1211122110089} is an apocalyptic number.

It is an amenable number.

1211122110089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211122110089 is an equidigital number, since it uses as much as digits as its factorization.

1211122110089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 1211122110089 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred ten thousand, eighty-nine".