2001312003 has 16 divisors (see below), whose sum is σ = 2712863232. Its totient is φ = 1312080000.

The previous prime is 2001311993. The next prime is 2001312017. The reversal of 2001312003 is 3002131002.

It is a happy number.

It is not a de Polignac number, because 2001312003 - 2⁴ = 2001311987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001312003.

It is not an unprimeable number, because it can be changed into a prime (2001312023) 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, 73698 + ... + 97128.

It is an arithmetic number, because the mean of its divisors is an integer number (169553952).

Almost surely, 2^2001312003 is an apocalyptic number.

2001312003 is a deficient number, since it is larger than the sum of its proper divisors (711551229).

2001312003 is a wasteful number, since it uses less digits than its factorization.

2001312003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23906.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2001312003 is about 44736.0257845956. The cubic root of 2001312003 is about 1260.1964930395.

Adding to 2001312003 its reverse (3002131002), we get a palindrome (5003443005).

The spelling of 2001312003 in words is "two billion, one million, three hundred twelve thousand, three".