2001323113 has 4 divisors (see below), whose sum is σ = 2119048020. Its totient is φ = 1883598208.

The previous prime is 2001323087. The next prime is 2001323123. The reversal of 2001323113 is 3113231002.

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 1787344729 + 213978384 = 42277^2 + 14628^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001323113 - 2⁹ = 2001322601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001323123) 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, 58862428 + ... + 58862461.

It is an arithmetic number, because the mean of its divisors is an integer number (529762005).

Almost surely, 2^2001323113 is an apocalyptic number.

It is an amenable number.

2001323113 is a deficient number, since it is larger than the sum of its proper divisors (117724907).

2001323113 is a wasteful number, since it uses less digits than its factorization.

2001323113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117724906.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2001323113 is about 44736.1499572773. The cubic root of 2001323113 is about 1260.1988249693.

Adding to 2001323113 its reverse (3113231002), we get a palindrome (5114554115).

The spelling of 2001323113 in words is "two billion, one million, three hundred twenty-three thousand, one hundred thirteen".