2011100243 has 4 divisors (see below), whose sum is σ = 2098539408. Its totient is φ = 1923661080.

The previous prime is 2011100237. The next prime is 2011100251. The reversal of 2011100243 is 3420011102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2011100243 - 2²² = 2006905939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011100843) 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, 43719548 + ... + 43719593.

It is an arithmetic number, because the mean of its divisors is an integer number (524634852).

Almost surely, 2^2011100243 is an apocalyptic number.

2011100243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2011100243 is a deficient number, since it is larger than the sum of its proper divisors (87439165).

2011100243 is an equidigital number, since it uses as much as digits as its factorization.

2011100243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87439164.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2011100243 is about 44845.2923170315. The cubic root of 2011100243 is about 1262.2476558428.

Adding to 2011100243 its reverse (3420011102), we get a palindrome (5431111345).

The spelling of 2011100243 in words is "two billion, eleven million, one hundred thousand, two hundred forty-three".