11243044021 has 16 divisors (see below), whose sum is σ = 12960970560. Its totient is φ = 9645281280.

The previous prime is 11243044003. The next prime is 11243044049. The reversal of 11243044021 is 12044034211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11243044021 - 2¹⁹ = 11242519733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11243043983 and 11243044001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11243044121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50946 + ... + 158371.

It is an arithmetic number, because the mean of its divisors is an integer number (810060660).

Almost surely, 2^11243044021 is an apocalyptic number.

11243044021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11243044021 is a deficient number, since it is larger than the sum of its proper divisors (1717926539).

11243044021 is a wasteful number, since it uses less digits than its factorization.

11243044021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209604.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 11243044021 its reverse (12044034211), we get a palindrome (23287078232).

The spelling of 11243044021 in words is "eleven billion, two hundred forty-three million, forty-four thousand, twenty-one".