121544369 has 2 divisors, whose sum is σ = 121544370. Its totient is φ = 121544368.

The previous prime is 121544347. The next prime is 121544383. The reversal of 121544369 is 963445121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113209600 + 8334769 = 10640^2 + 2887^2 .

It is an emirp because it is prime and its reverse (963445121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121544369 - 2¹² = 121540273 is a prime.

It is a super-2 number, since 2×121544369² = 29546067271216322, which 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 (121544669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60772184 + 60772185.

It is an arithmetic number, because the mean of its divisors is an integer number (60772185).

Almost surely, 2^121544369 is an apocalyptic number.

It is an amenable number.

121544369 is a deficient number, since it is larger than the sum of its proper divisors (1).

121544369 is an equidigital number, since it uses as much as digits as its factorization.

121544369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 121544369 is about 11024.7162775284. The cubic root of 121544369 is about 495.3493693838.

The spelling of 121544369 in words is "one hundred twenty-one million, five hundred forty-four thousand, three hundred sixty-nine".