131011211 has 4 divisors (see below), whose sum is σ = 133231800. Its totient is φ = 128790624.

The previous prime is 131011201. The next prime is 131011229. The reversal of 131011211 is 112110131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131011211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131011192 and 131011201.

It is not an unprimeable number, because it can be changed into a prime (131011201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110206 + ... + 1110323.

It is an arithmetic number, because the mean of its divisors is an integer number (33307950).

Almost surely, 2^131011211 is an apocalyptic number.

131011211 is a deficient number, since it is larger than the sum of its proper divisors (2220589).

131011211 is an equidigital number, since it uses as much as digits as its factorization.

131011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220588.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 131011211 is about 11446.0128865907. The cubic root of 131011211 is about 507.8897954155.

Adding to 131011211 its reverse (112110131), we get a palindrome (243121342).

It can be divided in two parts, 1310 and 11211, that added together give a palindrome (12521).

The spelling of 131011211 in words is "one hundred thirty-one million, eleven thousand, two hundred eleven".