12131322225 has 48 divisors (see below), whose sum is σ = 22586363904. Its totient is φ = 5692104000.

The previous prime is 12131322223. The next prime is 12131322227. The reversal of 12131322225 is 52222313121.

It is an interprime number because it is at equal distance from previous prime (12131322223) and next prime (12131322227).

It is not a de Polignac number, because 12131322225 - 2¹ = 12131322223 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12131322195 and 12131322204.

It is not an unprimeable number, because it can be changed into a prime (12131322221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 211597 + ... + 262746.

It is an arithmetic number, because the mean of its divisors is an integer number (470549248).

Almost surely, 2^12131322225 is an apocalyptic number.

12131322225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12131322225 is a deficient number, since it is larger than the sum of its proper divisors (10455041679).

12131322225 is a wasteful number, since it uses less digits than its factorization.

12131322225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474398 (or 474393 counting only the distinct ones).

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

Adding to 12131322225 its reverse (52222313121), we get a palindrome (64353635346).

The spelling of 12131322225 in words is "twelve billion, one hundred thirty-one million, three hundred twenty-two thousand, two hundred twenty-five".