12225131 has 4 divisors (see below), whose sum is σ = 12333432. Its totient is φ = 12116832.

The previous prime is 12225107. The next prime is 12225149. The reversal of 12225131 is 13152221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13152221 = 59 ⋅222919.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12225131 is a prime.

It is a super-2 number, since 2×12225131² = 298907655934322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12215131) 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 3 ways as a sum of consecutive naturals, for example, 53981 + ... + 54206.

It is an arithmetic number, because the mean of its divisors is an integer number (3083358).

Almost surely, 2^12225131 is an apocalyptic number.

12225131 is a deficient number, since it is larger than the sum of its proper divisors (108301).

12225131 is a wasteful number, since it uses less digits than its factorization.

12225131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108300.

The product of its digits is 120, while the sum is 17.

The square root of 12225131 is about 3496.4454807704. The cubic root of 12225131 is about 230.3657130832.

Adding to 12225131 its reverse (13152221), we get a palindrome (25377352).

The spelling of 12225131 in words is "twelve million, two hundred twenty-five thousand, one hundred thirty-one".