11055100421 has 2 divisors, whose sum is σ = 11055100422. Its totient is φ = 11055100420.

The previous prime is 11055100403. The next prime is 11055100457. The reversal of 11055100421 is 12400155011.

11055100421 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., 10617035521 + 438064900 = 103039^2 + 20930^2 .

It is a cyclic number.

It is not a de Polignac number, because 11055100421 - 2¹⁰ = 11055099397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11055100393 and 11055100402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11055100481) 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, 5527550210 + 5527550211.

It is an arithmetic number, because the mean of its divisors is an integer number (5527550211).

Almost surely, 2^11055100421 is an apocalyptic number.

It is an amenable number.

11055100421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11055100421 is an equidigital number, since it uses as much as digits as its factorization.

11055100421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 11055100421 its reverse (12400155011), we get a palindrome (23455255432).

The spelling of 11055100421 in words is "eleven billion, fifty-five million, one hundred thousand, four hundred twenty-one".