11112443021 has 2 divisors, whose sum is σ = 11112443022. Its totient is φ = 11112443020.

The previous prime is 11112442997. The next prime is 11112443029. The reversal of 11112443021 is 12034421111.

11112443021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9858504100 + 1253938921 = 99290^2 + 35411^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112443021 - 2¹⁰ = 11112441997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11112442984 and 11112443002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112443029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556221510 + 5556221511.

It is an arithmetic number, because the mean of its divisors is an integer number (5556221511).

Almost surely, 2^11112443021 is an apocalyptic number.

It is an amenable number.

11112443021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112443021 is an equidigital number, since it uses as much as digits as its factorization.

11112443021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11112443021 its reverse (12034421111), we get a palindrome (23146864132).

The spelling of 11112443021 in words is "eleven billion, one hundred twelve million, four hundred forty-three thousand, twenty-one".