111221220202189 has 2 divisors, whose sum is σ = 111221220202190. Its totient is φ = 111221220202188.

The previous prime is 111221220202159. The next prime is 111221220202207. The reversal of 111221220202189 is 981202022122111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103830842026564 + 7390378175625 = 10189742^2 + 2718525^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221220202189 - 2¹¹ = 111221220200141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221220202139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610610101094 + 55610610101095.

It is an arithmetic number, because the mean of its divisors is an integer number (55610610101095).

Almost surely, 2^{111221220202189} is an apocalyptic number.

It is an amenable number.

111221220202189 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221220202189 is an equidigital number, since it uses as much as digits as its factorization.

111221220202189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 34.

The spelling of 111221220202189 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred two thousand, one hundred eighty-nine".