2001100243 has 8 divisors (see below), whose sum is σ = 2170491120. Its totient is φ = 1837451520.

The previous prime is 2001100237. The next prime is 2001100291. The reversal of 2001100243 is 3420011002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001100243 - 2¹⁷ = 2000969171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001100643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434813 + ... + 1436206.

It is an arithmetic number, because the mean of its divisors is an integer number (271311390).

Almost surely, 2^2001100243 is an apocalyptic number.

2001100243 is a deficient number, since it is larger than the sum of its proper divisors (169390877).

2001100243 is a wasteful number, since it uses less digits than its factorization.

2001100243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871077.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2001100243 is about 44733.6589493862. The cubic root of 2001100243 is about 1260.1520440944.

Adding to 2001100243 its reverse (3420011002), we get a palindrome (5421111245).

The spelling of 2001100243 in words is "two billion, one million, one hundred thousand, two hundred forty-three".