111102220121209 has 2 divisors, whose sum is σ = 111102220121210. Its totient is φ = 111102220121208.

The previous prime is 111102220121177. The next prime is 111102220121251. The reversal of 111102220121209 is 902121022201111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110568484674025 + 533735447184 = 10515155^2 + 730572^2 .

It is a cyclic number.

It is not a de Polignac number, because 111102220121209 - 2⁵ = 111102220121177 is a prime.

It is not a weakly prime, because it can be changed into another prime (111102220121509) 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, 55551110060604 + 55551110060605.

It is an arithmetic number, because the mean of its divisors is an integer number (55551110060605).

Almost surely, 2^{111102220121209} is an apocalyptic number.

It is an amenable number.

111102220121209 is a deficient number, since it is larger than the sum of its proper divisors (1).

111102220121209 is an equidigital number, since it uses as much as digits as its factorization.

111102220121209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 111102220121209 in words is "one hundred eleven trillion, one hundred two billion, two hundred twenty million, one hundred twenty-one thousand, two hundred nine".