131211 has 12 divisors (see below), whose sum is σ = 193440. Its totient is φ = 85680.

The previous prime is 131203. The next prime is 131213. The reversal of 131211 is 112131.

It is not a de Polignac number, because 131211 - 2³ = 131203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 131193 and 131202.

It is not an unprimeable number, because it can be changed into a prime (131213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (16120).

2¹³¹²¹¹ is an apocalyptic number.

131211 is a deficient number, since it is larger than the sum of its proper divisors (62229).

131211 is a wasteful number, since it uses less digits than its factorization.

131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 303 counting only the distinct ones).

The product of its digits is 6, while the sum is 9.

The square root of 131211 is about 362.2305895421. The cubic root of 131211 is about 50.8147837601.

Adding to 131211 its reverse (112131), we get a palindrome (243342).

The spelling of 131211 in words is "one hundred thirty-one thousand, two hundred eleven".