121855049 has 2 divisors, whose sum is σ = 121855050. Its totient is φ = 121855048.

The previous prime is 121855043. The next prime is 121855073. The reversal of 121855049 is 940558121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 36385024 = 9245^2 + 6032^2 .

It is a cyclic number.

It is not a de Polignac number, because 121855049 - 2⁴ = 121855033 is a prime.

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 (121855043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60927524 + 60927525.

It is an arithmetic number, because the mean of its divisors is an integer number (60927525).

Almost surely, 2^121855049 is an apocalyptic number.

It is an amenable number.

121855049 is a deficient number, since it is larger than the sum of its proper divisors (1).

121855049 is an equidigital number, since it uses as much as digits as its factorization.

121855049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 121855049 is about 11038.7974435624. The cubic root of 121855049 is about 495.7710650583.

The spelling of 121855049 in words is "one hundred twenty-one million, eight hundred fifty-five thousand, forty-nine".