225121201 has 12 divisors (see below), whose sum is σ = 232487836. Its totient is φ = 217975680.

The previous prime is 225121153. The next prime is 225121207. The reversal of 225121201 is 102121522.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 147258225 + 77862976 = 12135^2 + 8824^2 .

It is not a de Polignac number, because 225121201 - 2⁹ = 225120689 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 (225121207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263491 + ... + 264343.

Almost surely, 2^225121201 is an apocalyptic number.

It is an amenable number.

225121201 is a deficient number, since it is larger than the sum of its proper divisors (7366635).

225121201 is an equidigital number, since it uses as much as digits as its factorization.

225121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 225121201 is about 15004.0394894175. The cubic root of 225121201 is about 608.3293901706.

Adding to 225121201 its reverse (102121522), we get a palindrome (327242723).

The spelling of 225121201 in words is "two hundred twenty-five million, one hundred twenty-one thousand, two hundred one".