121223225 has 12 divisors (see below), whose sum is σ = 156853056. Its totient is φ = 92761680.

The previous prime is 121223213. The next prime is 121223227. The reversal of 121223225 is 522322121.

It is not a de Polignac number, because 121223225 - 2²⁴ = 104446009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121223197 and 121223206.

It is not an unprimeable number, because it can be changed into a prime (121223227) 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, 104837 + ... + 105986.

It is an arithmetic number, because the mean of its divisors is an integer number (13071088).

Almost surely, 2^121223225 is an apocalyptic number.

It is an amenable number.

121223225 is a deficient number, since it is larger than the sum of its proper divisors (35629831).

121223225 is a wasteful number, since it uses less digits than its factorization.

121223225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210856 (or 210851 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 121223225 is about 11010.1419155250. The cubic root of 121223225 is about 494.9127146030.

Adding to 121223225 its reverse (522322121), we get a palindrome (643545346).

The spelling of 121223225 in words is "one hundred twenty-one million, two hundred twenty-three thousand, two hundred twenty-five".