201212121121169 has 2 divisors, whose sum is σ = 201212121121170. Its totient is φ = 201212121121168.

The previous prime is 201212121121153. The next prime is 201212121121229. The reversal of 201212121121169 is 961121121212102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140313216870544 + 60898904250625 = 11845388^2 + 7803775^2 .

It is a cyclic number.

It is not a de Polignac number, because 201212121121169 - 2⁴ = 201212121121153 is a prime.

It is a super-2 number, since 2×201212121121169² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (201212121121139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606060560584 + 100606060560585.

It is an arithmetic number, because the mean of its divisors is an integer number (100606060560585).

Almost surely, 2^{201212121121169} is an apocalyptic number.

It is an amenable number.

201212121121169 is a deficient number, since it is larger than the sum of its proper divisors (1).

201212121121169 is an equidigital number, since it uses as much as digits as its factorization.

201212121121169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 32.

The spelling of 201212121121169 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred sixty-nine".