2101440223 has 4 divisors (see below), whose sum is σ = 2212042360. Its totient is φ = 1990838088.

The previous prime is 2101440217. The next prime is 2101440247. The reversal of 2101440223 is 3220441012.

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

It is a de Polignac number, because none of the positive numbers 2^k-2101440223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 110602117 = 2101440223 / (2 + 1 + 0 + 1 + 4 + 4 + 0 + 2 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101440223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101440283) 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, 55301040 + ... + 55301077.

It is an arithmetic number, because the mean of its divisors is an integer number (553010590).

Almost surely, 2^2101440223 is an apocalyptic number.

2101440223 is a deficient number, since it is larger than the sum of its proper divisors (110602137).

2101440223 is a wasteful number, since it uses less digits than its factorization.

2101440223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110602136.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2101440223 is about 45841.4683774418. The cubic root of 2101440223 is about 1280.8718472261.

Adding to 2101440223 its reverse (3220441012), we get a palindrome (5321881235).

The spelling of 2101440223 in words is "two billion, one hundred one million, four hundred forty thousand, two hundred twenty-three".