2001311120 has 20 divisors (see below), whose sum is σ = 4653048540. Its totient is φ = 800524416.

The previous prime is 2001311107. The next prime is 2001311129. The reversal of 2001311120 is 211131002.

It can be written as a sum of positive squares in 2 ways, for example, as 636451984 + 1364859136 = 25228^2 + 36944^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (2001311129) 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, 12508115 + ... + 12508274.

It is an arithmetic number, because the mean of its divisors is an integer number (232652427).

Almost surely, 2^2001311120 is an apocalyptic number.

2001311120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001311120 is an abundant number, since it is smaller than the sum of its proper divisors (2651737420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001311120 is a wasteful number, since it uses less digits than its factorization.

2001311120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25016402 (or 25016396 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2001311120 is about 44736.0159155909. The cubic root of 2001311120 is about 1260.1963077021.

Adding to 2001311120 its reverse (211131002), we get a palindrome (2212442122).

The spelling of 2001311120 in words is "two billion, one million, three hundred eleven thousand, one hundred twenty".