131011031233 has 4 divisors (see below), whose sum is σ = 138717562500. Its totient is φ = 123304499968.

The previous prime is 131011031209. The next prime is 131011031237. The reversal of 131011031233 is 332130110131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 106708715569 + 24302315664 = 326663^2 + 155892^2 .

It is a cyclic number.

It is not a de Polignac number, because 131011031233 - 2¹³ = 131011023041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131011031233.

It is not an unprimeable number, because it can be changed into a prime (131011031237) 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 3 ways as a sum of consecutive naturals, for example, 3853265608 + ... + 3853265641.

It is an arithmetic number, because the mean of its divisors is an integer number (34679390625).

Almost surely, 2^131011031233 is an apocalyptic number.

It is an amenable number.

131011031233 is a deficient number, since it is larger than the sum of its proper divisors (7706531267).

131011031233 is an equidigital number, since it uses as much as digits as its factorization.

131011031233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7706531266.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 131011031233 its reverse (332130110131), we get a palindrome (463141141364).

The spelling of 131011031233 in words is "one hundred thirty-one billion, eleven million, thirty-one thousand, two hundred thirty-three".