2003123120331 has 16 divisors (see below), whose sum is σ = 2811534669440. Its totient is φ = 1265070182400.

The previous prime is 2003123120329. The next prime is 2003123120351. The reversal of 2003123120331 is 1330213213002.

It is not a de Polignac number, because 2003123120331 - 2¹ = 2003123120329 is a prime.

It is a super-2 number, since 2×2003123120331² (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 = 2003123120298 and 2003123120307.

It is not an unprimeable number, because it can be changed into a prime (2003123120351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387531 + ... + 2038731.

It is an arithmetic number, because the mean of its divisors is an integer number (175720916840).

Almost surely, 2^{2003123120331} is an apocalyptic number.

2003123120331 is a deficient number, since it is larger than the sum of its proper divisors (808411549109).

2003123120331 is a wasteful number, since it uses less digits than its factorization.

2003123120331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672506.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 2003123120331 its reverse (1330213213002), we get a palindrome (3333336333333).

The spelling of 2003123120331 in words is "two trillion, three billion, one hundred twenty-three million, one hundred twenty thousand, three hundred thirty-one".