123121013003 has 4 divisors (see below), whose sum is σ = 123367749000. Its totient is φ = 122874277008.

The previous prime is 123121012981. The next prime is 123121013009. The reversal of 123121013003 is 300310121321.

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 123121013003 - 2⁸ = 123121012747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123121013009) 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 in 3 ways as a sum of consecutive naturals, for example, 123367250 + ... + 123368247.

It is an arithmetic number, because the mean of its divisors is an integer number (30841937250).

Almost surely, 2^123121013003 is an apocalyptic number.

123121013003 is a deficient number, since it is larger than the sum of its proper divisors (246735997).

123121013003 is an equidigital number, since it uses as much as digits as its factorization.

123121013003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246735996.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 123121013003 its reverse (300310121321), we get a palindrome (423431134324).

The spelling of 123121013003 in words is "one hundred twenty-three billion, one hundred twenty-one million, thirteen thousand, three".