123121130003 has 4 divisors (see below), whose sum is σ = 127366686240. Its totient is φ = 118875573768.

The previous prime is 123121129993. The next prime is 123121130039. The reversal of 123121130003 is 300031121321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300031121321 = 83 ⋅3614832787.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123121130003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123121132003) 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 in 3 ways as a sum of consecutive naturals, for example, 2122778075 + ... + 2122778132.

It is an arithmetic number, because the mean of its divisors is an integer number (31841671560).

Almost surely, 2^123121130003 is an apocalyptic number.

123121130003 is a deficient number, since it is larger than the sum of its proper divisors (4245556237).

123121130003 is an equidigital number, since it uses as much as digits as its factorization.

123121130003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245556236.

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

Adding to 123121130003 its reverse (300031121321), we get a palindrome (423152251324).

The spelling of 123121130003 in words is "one hundred twenty-three billion, one hundred twenty-one million, one hundred thirty thousand, three".