121550123 has 2 divisors, whose sum is σ = 121550124. Its totient is φ = 121550122.

The previous prime is 121550081. The next prime is 121550159. The reversal of 121550123 is 321055121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (321055121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121550123 - 2⁸ = 121549867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121550095 and 121550104.

It is not a weakly prime, because it can be changed into another prime (121550173) 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, 60775061 + 60775062.

It is an arithmetic number, because the mean of its divisors is an integer number (60775062).

Almost surely, 2^121550123 is an apocalyptic number.

121550123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121550123 is an equidigital number, since it uses as much as digits as its factorization.

121550123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 121550123 is about 11024.9772335366. The cubic root of 121550123 is about 495.3571859952.

The spelling of 121550123 in words is "one hundred twenty-one million, five hundred fifty thousand, one hundred twenty-three".