2003122013 has 4 divisors (see below), whose sum is σ = 2003288700. Its totient is φ = 2002955328.

The previous prime is 2003122007. The next prime is 2003122027. The reversal of 2003122013 is 3102213002.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1261812484 + 741309529 = 35522^2 + 27227^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2003122013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003122213) 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, 63788 + ... + 89861.

It is an arithmetic number, because the mean of its divisors is an integer number (500822175).

Almost surely, 2^2003122013 is an apocalyptic number.

It is an amenable number.

2003122013 is a deficient number, since it is larger than the sum of its proper divisors (166687).

2003122013 is a wasteful number, since it uses less digits than its factorization.

2003122013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166686.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2003122013 is about 44756.2511052925. The cubic root of 2003122013 is about 1260.5762907174.

Adding to 2003122013 its reverse (3102213002), we get a palindrome (5105335015).

It can be divided in two parts, 200 and 3122013, that added together give a palindrome (3122213).

The spelling of 2003122013 in words is "two billion, three million, one hundred twenty-two thousand, thirteen".