131211011 has 4 divisors (see below), whose sum is σ = 131245992. Its totient is φ = 131176032.

The previous prime is 131211007. The next prime is 131211013. The reversal of 131211011 is 110112131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110112131 = 229 ⋅480839.

It is a cyclic number.

It is not a de Polignac number, because 131211011 - 2² = 131211007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131210983 and 131211001.

It is not an unprimeable number, because it can be changed into a prime (131211013) 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, 11081 + ... + 19626.

It is an arithmetic number, because the mean of its divisors is an integer number (32811498).

Almost surely, 2^131211011 is an apocalyptic number.

131211011 is a deficient number, since it is larger than the sum of its proper divisors (34981).

131211011 is an equidigital number, since it uses as much as digits as its factorization.

131211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34980.

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

The square root of 131211011 is about 11454.7374915360. The cubic root of 131211011 is about 508.1478518015.

Adding to 131211011 its reverse (110112131), we get a palindrome (241323142).

The spelling of 131211011 in words is "one hundred thirty-one million, two hundred eleven thousand, eleven".