11255355421 has 2 divisors, whose sum is σ = 11255355422. Its totient is φ = 11255355420.

The previous prime is 11255355389. The next prime is 11255355437. The reversal of 11255355421 is 12455355211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11051265625 + 204089796 = 105125^2 + 14286^2 .

It is a cyclic number.

It is not a de Polignac number, because 11255355421 - 2⁵ = 11255355389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11255352421) 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, 5627677710 + 5627677711.

It is an arithmetic number, because the mean of its divisors is an integer number (5627677711).

Almost surely, 2^11255355421 is an apocalyptic number.

It is an amenable number.

11255355421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11255355421 is an equidigital number, since it uses as much as digits as its factorization.

11255355421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30000, while the sum is 34.

The spelling of 11255355421 in words is "eleven billion, two hundred fifty-five million, three hundred fifty-five thousand, four hundred twenty-one".