131131111333 has 2 divisors, whose sum is σ = 131131111334. Its totient is φ = 131131111332.

The previous prime is 131131111313. The next prime is 131131111421. The reversal of 131131111333 is 333111131131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97767531684 + 33363579649 = 312678^2 + 182657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131131111333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131131111313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65565555666 + 65565555667.

It is an arithmetic number, because the mean of its divisors is an integer number (65565555667).

Almost surely, 2^131131111333 is an apocalyptic number.

It is an amenable number.

131131111333 is a deficient number, since it is larger than the sum of its proper divisors (1).

131131111333 is an equidigital number, since it uses as much as digits as its factorization.

131131111333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243, while the sum is 22.

Adding to 131131111333 its reverse (333111131131), we get a palindrome (464242242464).

The spelling of 131131111333 in words is "one hundred thirty-one billion, one hundred thirty-one million, one hundred eleven thousand, three hundred thirty-three".