121544123 has 2 divisors, whose sum is σ = 121544124. Its totient is φ = 121544122.

The previous prime is 121544099. The next prime is 121544141. The reversal of 121544123 is 321445121.

It is a strong prime.

It is an emirp because it is prime and its reverse (321445121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121544123 - 2⁸ = 121543867 is a prime.

It is not a weakly prime, because it can be changed into another prime (121544173) 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, 60772061 + 60772062.

It is an arithmetic number, because the mean of its divisors is an integer number (60772062).

Almost surely, 2^121544123 is an apocalyptic number.

121544123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121544123 is an equidigital number, since it uses as much as digits as its factorization.

121544123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 23.

The square root of 121544123 is about 11024.7051207731. The cubic root of 121544123 is about 495.3490351957.

Adding to 121544123 its reverse (321445121), we get a palindrome (442989244).

The spelling of 121544123 in words is "one hundred twenty-one million, five hundred forty-four thousand, one hundred twenty-three".