121120225 has 6 divisors (see below), whose sum is σ = 150189110. Its totient is φ = 96896160.

The previous prime is 121120199. The next prime is 121120229. The reversal of 121120225 is 522021121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 471969 + 120648256 = 687^2 + 10984^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121120225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121120199 and 121120208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2422380 + ... + 2422429.

Almost surely, 2^121120225 is an apocalyptic number.

It is an amenable number.

121120225 is a deficient number, since it is larger than the sum of its proper divisors (29068885).

121120225 is an equidigital number, since it uses as much as digits as its factorization.

121120225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4844819 (or 4844814 counting only the distinct ones).

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

The square root of 121120225 is about 11005.4634159585. The cubic root of 121120225 is about 494.7725036986.

Adding to 121120225 its reverse (522021121), we get a palindrome (643141346).

The spelling of 121120225 in words is "one hundred twenty-one million, one hundred twenty thousand, two hundred twenty-five".