2001223113 has 4 divisors (see below), whose sum is σ = 2668297488. Its totient is φ = 1334148740.

The previous prime is 2001223069. The next prime is 2001223129. The reversal of 2001223113 is 3113221002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2001223113 - 2⁸ = 2001222857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001223092 and 2001223101.

It is not an unprimeable number, because it can be changed into a prime (2001223163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333537183 + ... + 333537188.

It is an arithmetic number, because the mean of its divisors is an integer number (667074372).

Almost surely, 2^2001223113 is an apocalyptic number.

It is an amenable number.

2001223113 is a deficient number, since it is larger than the sum of its proper divisors (667074375).

2001223113 is an equidigital number, since it uses as much as digits as its factorization.

2001223113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667074374.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2001223113 is about 44735.0322789645. The cubic root of 2001223113 is about 1260.1778351916.

Adding to 2001223113 its reverse (3113221002), we get a palindrome (5114444115).

The spelling of 2001223113 in words is "two billion, one million, two hundred twenty-three thousand, one hundred thirteen".