121552243 has 2 divisors, whose sum is σ = 121552244. Its totient is φ = 121552242.

The previous prime is 121552241. The next prime is 121552259. The reversal of 121552243 is 342255121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121552243 - 2¹ = 121552241 is a prime.

Together with 121552241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121552241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60776121 + 60776122.

It is an arithmetic number, because the mean of its divisors is an integer number (60776122).

Almost surely, 2^121552243 is an apocalyptic number.

121552243 is a deficient number, since it is larger than the sum of its proper divisors (1).

121552243 is an equidigital number, since it uses as much as digits as its factorization.

121552243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 25.

The square root of 121552243 is about 11025.0733784406. The cubic root of 121552243 is about 495.3600658802.

The spelling of 121552243 in words is "one hundred twenty-one million, five hundred fifty-two thousand, two hundred forty-three".