123131122003 has 4 divisors (see below), whose sum is σ = 123131855848. Its totient is φ = 123130388160.

The previous prime is 123131121931. The next prime is 123131122021. The reversal of 123131122003 is 300221131321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 300221131321 = 91243 ⋅3290347.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123131122003 is a prime.

It is a super-2 number, since 2×123131122003² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123131122063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22600 + ... + 496762.

It is an arithmetic number, because the mean of its divisors is an integer number (30782963962).

Almost surely, 2^123131122003 is an apocalyptic number.

123131122003 is a deficient number, since it is larger than the sum of its proper divisors (733845).

123131122003 is an equidigital number, since it uses as much as digits as its factorization.

123131122003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733844.

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

Adding to 123131122003 its reverse (300221131321), we get a palindrome (423352253324).

The spelling of 123131122003 in words is "one hundred twenty-three billion, one hundred thirty-one million, one hundred twenty-two thousand, three".