2225244501221 has 4 divisors (see below), whose sum is σ = 2543136572832. Its totient is φ = 1907352429612.

The previous prime is 2225244501211. The next prime is 2225244501253. The reversal of 2225244501221 is 1221054425222.

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 not a de Polignac number, because 2225244501221 - 2¹⁸ = 2225244239077 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 (2225244501211) 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, 158946035795 + ... + 158946035808.

It is an arithmetic number, because the mean of its divisors is an integer number (635784143208).

Almost surely, 2^{2225244501221} is an apocalyptic number.

It is an amenable number.

2225244501221 is a deficient number, since it is larger than the sum of its proper divisors (317892071611).

2225244501221 is an equidigital number, since it uses as much as digits as its factorization.

2225244501221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317892071610.

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 2225244501221 its reverse (1221054425222), we get a palindrome (3446298926443).

The spelling of 2225244501221 in words is "two trillion, two hundred twenty-five billion, two hundred forty-four million, five hundred one thousand, two hundred twenty-one".