12226121225 has 12 divisors (see below), whose sum is σ = 15174875100. Its totient is φ = 9771552000.

The previous prime is 12226121221. The next prime is 12226121267. The reversal of 12226121225 is 52212162221.

It can be written as a sum of positive squares in 6 ways, for example, as 288592144 + 11937529081 = 16988^2 + 109259^2 .

It is not a de Polignac number, because 12226121225 - 2² = 12226121221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12226121194 and 12226121203.

It is not an unprimeable number, because it can be changed into a prime (12226121221) 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, 206876 + ... + 259325.

It is an arithmetic number, because the mean of its divisors is an integer number (1264572925).

Almost surely, 2^12226121225 is an apocalyptic number.

It is an amenable number.

12226121225 is a deficient number, since it is larger than the sum of its proper divisors (2948753875).

12226121225 is a wasteful number, since it uses less digits than its factorization.

12226121225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467260 (or 467255 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

Adding to 12226121225 its reverse (52212162221), we get a palindrome (64438283446).

The spelling of 12226121225 in words is "twelve billion, two hundred twenty-six million, one hundred twenty-one thousand, two hundred twenty-five".