1003123123331 has 4 divisors (see below), whose sum is σ = 1146426426672. Its totient is φ = 859819819992.

The previous prime is 1003123123307. The next prime is 1003123123339. The reversal of 1003123123331 is 1333213213001.

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

It is a de Polignac number, because none of the positive numbers 2^k-1003123123331 is a prime.

It is a super-2 number, since 2×1003123123331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1003123123297 and 1003123123306.

It is not an unprimeable number, because it can be changed into a prime (1003123123339) 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, 71651651660 + ... + 71651651673.

It is an arithmetic number, because the mean of its divisors is an integer number (286606606668).

Almost surely, 2^{1003123123331} is an apocalyptic number.

1003123123331 is a deficient number, since it is larger than the sum of its proper divisors (143303303341).

1003123123331 is an equidigital number, since it uses as much as digits as its factorization.

1003123123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143303303340.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 1003123123331 its reverse (1333213213001), we get a palindrome (2336336336332).

The spelling of 1003123123331 in words is "one trillion, three billion, one hundred twenty-three million, one hundred twenty-three thousand, three hundred thirty-one".