201222121189 has 2 divisors, whose sum is σ = 201222121190. Its totient is φ = 201222121188.

The previous prime is 201222121153. The next prime is 201222121213. The reversal of 201222121189 is 981121222102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113616184900 + 87605936289 = 337070^2 + 295983^2 .

It is a cyclic number.

It is not a de Polignac number, because 201222121189 - 2⁹ = 201222120677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201222121189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201222121889) 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, 100611060594 + 100611060595.

It is an arithmetic number, because the mean of its divisors is an integer number (100611060595).

Almost surely, 2^201222121189 is an apocalyptic number.

It is an amenable number.

201222121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

201222121189 is an equidigital number, since it uses as much as digits as its factorization.

201222121189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 201222121189 in words is "two hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred eighty-nine".