225126341221 has 4 divisors (see below), whose sum is σ = 225164253600. Its totient is φ = 225088428844.

The previous prime is 225126341197. The next prime is 225126341227. The reversal of 225126341221 is 122143621522.

It is a happy number.

225126341221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 225126341221 - 2⁵ = 225126341189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225126341227) 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 in 3 ways as a sum of consecutive naturals, for example, 18947281 + ... + 18959158.

It is an arithmetic number, because the mean of its divisors is an integer number (56291063400).

Almost surely, 2^225126341221 is an apocalyptic number.

It is an amenable number.

225126341221 is a deficient number, since it is larger than the sum of its proper divisors (37912379).

225126341221 is an equidigital number, since it uses as much as digits as its factorization.

225126341221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37912378.

The product of its digits is 11520, while the sum is 31.

Adding to 225126341221 its reverse (122143621522), we get a palindrome (347269962743).

The spelling of 225126341221 in words is "two hundred twenty-five billion, one hundred twenty-six million, three hundred forty-one thousand, two hundred twenty-one".