12131211 has 8 divisors (see below), whose sum is σ = 16335504. Its totient is φ = 8007200.

The previous prime is 12131179. The next prime is 12131219. The reversal of 12131211 is 11213121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12131211 - 2⁵ = 12131179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12131219) 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 7 ways as a sum of consecutive naturals, for example, 19716 + ... + 20321.

It is an arithmetic number, because the mean of its divisors is an integer number (2041938).

Almost surely, 2^12131211 is an apocalyptic number.

12131211 is a deficient number, since it is larger than the sum of its proper divisors (4204293).

12131211 is a wasteful number, since it uses less digits than its factorization.

12131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40141.

The product of its digits is 12, while the sum is 12.

The square root of 12131211 is about 3482.9888027382. The cubic root of 12131211 is about 229.7742649758.

Adding to 12131211 its reverse (11213121), we get a palindrome (23344332).

The spelling of 12131211 in words is "twelve million, one hundred thirty-one thousand, two hundred eleven".