225122101 has 4 divisors (see below), whose sum is σ = 225767500. Its totient is φ = 224476704.

The previous prime is 225122087. The next prime is 225122119. The reversal of 225122101 is 101221522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 159997201 + 65124900 = 12649^2 + 8070^2 .

It is a cyclic number.

It is not a de Polignac number, because 225122101 - 2⁵ = 225122069 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 (225122141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322176 + ... + 322873.

It is an arithmetic number, because the mean of its divisors is an integer number (56441875).

Almost surely, 2^225122101 is an apocalyptic number.

It is an amenable number.

225122101 is a deficient number, since it is larger than the sum of its proper divisors (645399).

225122101 is an equidigital number, since it uses as much as digits as its factorization.

225122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645398.

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

The square root of 225122101 is about 15004.0694813107. The cubic root of 225122101 is about 608.3302008387.

Adding to 225122101 its reverse (101221522), we get a palindrome (326343623).

The spelling of 225122101 in words is "two hundred twenty-five million, one hundred twenty-two thousand, one hundred one".