111221511706849 has 2 divisors, whose sum is σ = 111221511706850. Its totient is φ = 111221511706848.

The previous prime is 111221511706841. The next prime is 111221511706873. The reversal of 111221511706849 is 948607115122111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107551003662400 + 3670508044449 = 10370680^2 + 1915857^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221511706849 - 2³ = 111221511706841 is a prime.

It is not a weakly prime, because it can be changed into another prime (111221511706841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610755853424 + 55610755853425.

It is an arithmetic number, because the mean of its divisors is an integer number (55610755853425).

Almost surely, 2^{111221511706849} is an apocalyptic number.

It is an amenable number.

111221511706849 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221511706849 is an equidigital number, since it uses as much as digits as its factorization.

111221511706849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 49.

The spelling of 111221511706849 in words is "one hundred eleven trillion, two hundred twenty-one billion, five hundred eleven million, seven hundred six thousand, eight hundred forty-nine".