2003013123 has 4 divisors (see below), whose sum is σ = 2670684168. Its totient is φ = 1335342080.

The previous prime is 2003013101. The next prime is 2003013127. The reversal of 2003013123 is 3213103002.

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 2003013123 - 2¹³ = 2003004931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2003013127) 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, 333835518 + ... + 333835523.

It is an arithmetic number, because the mean of its divisors is an integer number (667671042).

Almost surely, 2^2003013123 is an apocalyptic number.

2003013123 is a deficient number, since it is larger than the sum of its proper divisors (667671045).

2003013123 is an equidigital number, since it uses as much as digits as its factorization.

2003013123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667671044.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 2003013123 is about 44755.0346106446. The cubic root of 2003013123 is about 1260.5534486009.

Adding to 2003013123 its reverse (3213103002), we get a palindrome (5216116125).

It can be divided in two parts, 20030 and 13123, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 2003013123 in words is "two billion, three million, thirteen thousand, one hundred twenty-three".