225504111421 has 2 divisors, whose sum is σ = 225504111422. Its totient is φ = 225504111420.

The previous prime is 225504111407. The next prime is 225504111449. The reversal of 225504111421 is 124111405522.

225504111421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (225504111449) can be obtained adding 225504111421 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224628602500 + 875508921 = 473950^2 + 29589^2 .

It is a cyclic number.

It is not a de Polignac number, because 225504111421 - 2²³ = 225495722813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225504111421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225504111451) 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, 112752055710 + 112752055711.

It is an arithmetic number, because the mean of its divisors is an integer number (112752055711).

Almost surely, 2^225504111421 is an apocalyptic number.

It is an amenable number.

225504111421 is a deficient number, since it is larger than the sum of its proper divisors (1).

225504111421 is an equidigital number, since it uses as much as digits as its factorization.

225504111421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 225504111421 its reverse (124111405522), we get a palindrome (349615516943).

The spelling of 225504111421 in words is "two hundred twenty-five billion, five hundred four million, one hundred eleven thousand, four hundred twenty-one".