123121303 has 2 divisors, whose sum is σ = 123121304. Its totient is φ = 123121302.

The previous prime is 123121301. The next prime is 123121307. The reversal of 123121303 is 303121321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123121303 - 2¹ = 123121301 is a prime.

Together with 123121301, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123121301) 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, 61560651 + 61560652.

It is an arithmetic number, because the mean of its divisors is an integer number (61560652).

Almost surely, 2^123121303 is an apocalyptic number.

123121303 is a deficient number, since it is larger than the sum of its proper divisors (1).

123121303 is an equidigital number, since it uses as much as digits as its factorization.

123121303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 123121303 is about 11096.0039203310. The cubic root of 123121303 is about 497.4824154791.

Adding to 123121303 its reverse (303121321), we get a palindrome (426242624).

The spelling of 123121303 in words is "one hundred twenty-three million, one hundred twenty-one thousand, three hundred three".