12123132225 has 48 divisors (see below), whose sum is σ = 21239444160. Its totient is φ = 6080512000.

The previous prime is 12123132223. The next prime is 12123132289. The reversal of 12123132225 is 52223132121.

It is not a de Polignac number, because 12123132225 - 2¹ = 12123132223 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12123132195 and 12123132204.

It is not an unprimeable number, because it can be changed into a prime (12123132223) 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 47 ways as a sum of consecutive naturals, for example, 2038306 + ... + 2044244.

It is an arithmetic number, because the mean of its divisors is an integer number (442488420).

Almost surely, 2^12123132225 is an apocalyptic number.

12123132225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12123132225 is a deficient number, since it is larger than the sum of its proper divisors (9116311935).

12123132225 is a wasteful number, since it uses less digits than its factorization.

12123132225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7570 (or 7565 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

Adding to 12123132225 its reverse (52223132121), we get a palindrome (64346264346).

The spelling of 12123132225 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-two thousand, two hundred twenty-five".