225552621121 has 2 divisors, whose sum is σ = 225552621122. Its totient is φ = 225552621120.

The previous prime is 225552621113. The next prime is 225552621181. The reversal of 225552621121 is 121126255522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209250438721 + 16302182400 = 457439^2 + 127680^2 .

It is a cyclic number.

It is not a de Polignac number, because 225552621121 - 2³ = 225552621113 is a prime.

It is not a weakly prime, because it can be changed into another prime (225552621181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112776310560 + 112776310561.

It is an arithmetic number, because the mean of its divisors is an integer number (112776310561).

Almost surely, 2^225552621121 is an apocalyptic number.

It is an amenable number.

225552621121 is a deficient number, since it is larger than the sum of its proper divisors (1).

225552621121 is an equidigital number, since it uses as much as digits as its factorization.

225552621121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24000, while the sum is 34.

Adding to 225552621121 its reverse (121126255522), we get a palindrome (346678876643).

The spelling of 225552621121 in words is "two hundred twenty-five billion, five hundred fifty-two million, six hundred twenty-one thousand, one hundred twenty-one".