2001112331 has 4 divisors (see below), whose sum is σ = 2001737592. Its totient is φ = 2000487072.

The previous prime is 2001112307. The next prime is 2001112339. The reversal of 2001112331 is 1332111002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1332111002 = 2 ⋅666055501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001112331 is a prime.

It is a super-2 number, since 2×2001112331² = 8008901122560507122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001112339) 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, 307805 + ... + 314238.

It is an arithmetic number, because the mean of its divisors is an integer number (500434398).

Almost surely, 2^2001112331 is an apocalyptic number.

2001112331 is a deficient number, since it is larger than the sum of its proper divisors (625261).

2001112331 is an equidigital number, since it uses as much as digits as its factorization.

2001112331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625260.

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

The square root of 2001112331 is about 44733.7940599722. The cubic root of 2001112331 is about 1260.1545814797.

Adding to 2001112331 its reverse (1332111002), we get a palindrome (3333223333).

The spelling of 2001112331 in words is "two billion, one million, one hundred twelve thousand, three hundred thirty-one".