2001231113 has 4 divisors (see below), whose sum is σ = 2287121280. Its totient is φ = 1715340948.

The previous prime is 2001231091. The next prime is 2001231131. The reversal of 2001231113 is 3111321002.

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 2001231113 - 2⁶ = 2001231049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001231413) 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, 142945073 + ... + 142945086.

It is an arithmetic number, because the mean of its divisors is an integer number (571780320).

Almost surely, 2^2001231113 is an apocalyptic number.

It is an amenable number.

2001231113 is a deficient number, since it is larger than the sum of its proper divisors (285890167).

2001231113 is an equidigital number, since it uses as much as digits as its factorization.

2001231113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285890166.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2001231113 is about 44735.1216942572. The cubic root of 2001231113 is about 1260.1795143995.

Adding to 2001231113 its reverse (3111321002), we get a palindrome (5112552115).

The spelling of 2001231113 in words is "two billion, one million, two hundred thirty-one thousand, one hundred thirteen".