201111121221889 has 2 divisors, whose sum is σ = 201111121221890. Its totient is φ = 201111121221888.

The previous prime is 201111121221749. The next prime is 201111121221947. The reversal of 201111121221889 is 988122121111102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186627920959489 + 14483200262400 = 13661183^2 + 3805680^2 .

It is a cyclic number.

It is not a de Polignac number, because 201111121221889 - 2¹³ = 201111121213697 is a prime.

It is not a weakly prime, because it can be changed into another prime (201111121221089) 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, 100555560610944 + 100555560610945.

It is an arithmetic number, because the mean of its divisors is an integer number (100555560610945).

Almost surely, 2^{201111121221889} is an apocalyptic number.

It is an amenable number.

201111121221889 is a deficient number, since it is larger than the sum of its proper divisors (1).

201111121221889 is an equidigital number, since it uses as much as digits as its factorization.

201111121221889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 40.

The spelling of 201111121221889 in words is "two hundred one trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, eight hundred eighty-nine".