123123121003 has 4 divisors (see below), whose sum is σ = 126450772960. Its totient is φ = 119795469048.

The previous prime is 123123120973. The next prime is 123123121007. The reversal of 123123121003 is 300121321321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123123121003 - 2²⁹ = 122586250091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123123121007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1663825923 + ... + 1663825996.

It is an arithmetic number, because the mean of its divisors is an integer number (31612693240).

Almost surely, 2^123123121003 is an apocalyptic number.

123123121003 is a deficient number, since it is larger than the sum of its proper divisors (3327651957).

123123121003 is an equidigital number, since it uses as much as digits as its factorization.

123123121003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327651956.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123123121003 its reverse (300121321321), we get a palindrome (423244442324).

The spelling of 123123121003 in words is "one hundred twenty-three billion, one hundred twenty-three million, one hundred twenty-one thousand, three".