131211211 has 8 divisors (see below), whose sum is σ = 132897024. Its totient is φ = 129534120.

The previous prime is 131211181. The next prime is 131211229. The reversal of 131211211 is 112112131.

It is a happy number.

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 131211211 - 2¹¹ = 131209163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131211191 and 131211200.

It is not an unprimeable number, because it can be changed into a prime (131211271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31306 + ... + 35248.

It is an arithmetic number, because the mean of its divisors is an integer number (16612128).

Almost surely, 2^131211211 is an apocalyptic number.

131211211 is a deficient number, since it is larger than the sum of its proper divisors (1685813).

131211211 is a wasteful number, since it uses less digits than its factorization.

131211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361.

The product of its digits is 12, while the sum is 13.

The square root of 131211211 is about 11454.7462215450. The cubic root of 131211211 is about 508.1481099849.

Adding to 131211211 its reverse (112112131), we get a palindrome (243323342).

The spelling of 131211211 in words is "one hundred thirty-one million, two hundred eleven thousand, two hundred eleven".