12207131 has 4 divisors (see below), whose sum is σ = 12214512. Its totient is φ = 12199752.

The previous prime is 12207127. The next prime is 12207179. The reversal of 12207131 is 13170221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12207131 - 2² = 12207127 is a prime.

It is a super-2 number, since 2×12207131² = 298028094502322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12207121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65 + ... + 4941.

It is an arithmetic number, because the mean of its divisors is an integer number (3053628).

Almost surely, 2^12207131 is an apocalyptic number.

12207131 is a deficient number, since it is larger than the sum of its proper divisors (7381).

12207131 is an equidigital number, since it uses as much as digits as its factorization.

12207131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7380.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 12207131 is about 3493.8704898722. The cubic root of 12207131 is about 230.2525958328.

Adding to 12207131 its reverse (13170221), we get a palindrome (25377352).

The spelling of 12207131 in words is "twelve million, two hundred seven thousand, one hundred thirty-one".