2225144523221 has 2 divisors, whose sum is σ = 2225144523222. Its totient is φ = 2225144523220.

The previous prime is 2225144523187. The next prime is 2225144523233. The reversal of 2225144523221 is 1223254415222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2219116708900 + 6027814321 = 1489670^2 + 77639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2225144523221 is a prime.

It is a super-2 number, since 2×2225144523221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2225144526221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1112572261610 + 1112572261611.

It is an arithmetic number, because the mean of its divisors is an integer number (1112572261611).

Almost surely, 2^{2225144523221} is an apocalyptic number.

It is an amenable number.

2225144523221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2225144523221 is an equidigital number, since it uses as much as digits as its factorization.

2225144523221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76800, while the sum is 35.

Adding to 2225144523221 its reverse (1223254415222), we get a palindrome (3448398938443).

The spelling of 2225144523221 in words is "two trillion, two hundred twenty-five billion, one hundred forty-four million, five hundred twenty-three thousand, two hundred twenty-one".