11123422421 has 2 divisors, whose sum is σ = 11123422422. Its totient is φ = 11123422420.

The previous prime is 11123422417. The next prime is 11123422441. The reversal of 11123422421 is 12422432111.

11123422421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9699492196 + 1423930225 = 98486^2 + 37735^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123422421 - 2² = 11123422417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11123422411) 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, 5561711210 + 5561711211.

It is an arithmetic number, because the mean of its divisors is an integer number (5561711211).

Almost surely, 2^11123422421 is an apocalyptic number.

It is an amenable number.

11123422421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123422421 is an equidigital number, since it uses as much as digits as its factorization.

11123422421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 23.

Adding to 11123422421 its reverse (12422432111), we get a palindrome (23545854532).

The spelling of 11123422421 in words is "eleven billion, one hundred twenty-three million, four hundred twenty-two thousand, four hundred twenty-one".