121544099 has 2 divisors, whose sum is σ = 121544100. Its totient is φ = 121544098.

The previous prime is 121544081. The next prime is 121544123. The reversal of 121544099 is 990445121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121544099 is a prime.

It is not a weakly prime, because it can be changed into another prime (121544009) 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, 60772049 + 60772050.

It is an arithmetic number, because the mean of its divisors is an integer number (60772050).

Almost surely, 2^121544099 is an apocalyptic number.

121544099 is a deficient number, since it is larger than the sum of its proper divisors (1).

121544099 is an equidigital number, since it uses as much as digits as its factorization.

121544099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 121544099 is about 11024.7040323085. The cubic root of 121544099 is about 495.3490025920.

The spelling of 121544099 in words is "one hundred twenty-one million, five hundred forty-four thousand, ninety-nine".