11243863021 has 4 divisors (see below), whose sum is σ = 11256540192. Its totient is φ = 11231185852.

The previous prime is 11243863013. The next prime is 11243863129. The reversal of 11243863021 is 12036834211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11243863021 - 2³ = 11243863013 is a prime.

It is a super-2 number, since 2×11243863021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11243863621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6337255 + ... + 6339028.

It is an arithmetic number, because the mean of its divisors is an integer number (2814135048).

Almost surely, 2^11243863021 is an apocalyptic number.

It is an amenable number.

11243863021 is a deficient number, since it is larger than the sum of its proper divisors (12677171).

11243863021 is an equidigital number, since it uses as much as digits as its factorization.

11243863021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12677170.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 11243863021 in words is "eleven billion, two hundred forty-three million, eight hundred sixty-three thousand, twenty-one".