111242224021 has 2 divisors, whose sum is σ = 111242224022. Its totient is φ = 111242224020.

The previous prime is 111242224019. The next prime is 111242224033. The reversal of 111242224021 is 120422242111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56684943396 + 54557280625 = 238086^2 + 233575^2 .

It is a cyclic number.

It is not a de Polignac number, because 111242224021 - 2¹ = 111242224019 is a prime.

Together with 111242224019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 111242223983 and 111242224001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111242224061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55621112010 + 55621112011.

It is an arithmetic number, because the mean of its divisors is an integer number (55621112011).

Almost surely, 2^111242224021 is an apocalyptic number.

It is an amenable number.

111242224021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111242224021 is an equidigital number, since it uses as much as digits as its factorization.

111242224021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 111242224021 its reverse (120422242111), we get a palindrome (231664466132).

The spelling of 111242224021 in words is "one hundred eleven billion, two hundred forty-two million, two hundred twenty-four thousand, twenty-one".