131011031231 has 4 divisors (see below), whose sum is σ = 131795528592. Its totient is φ = 130226533872.

The previous prime is 131011031209. The next prime is 131011031237. The reversal of 131011031231 is 132130110131.

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

It is a cyclic number.

It is not a de Polignac number, because 131011031231 - 2⁶ = 131011031167 is a prime.

It is a super-2 number, since 2×131011031231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131011031237) 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, 392248430 + ... + 392248763.

It is an arithmetic number, because the mean of its divisors is an integer number (32948882148).

Almost surely, 2^131011031231 is an apocalyptic number.

131011031231 is a deficient number, since it is larger than the sum of its proper divisors (784497361).

131011031231 is an equidigital number, since it uses as much as digits as its factorization.

131011031231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784497360.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 131011031231 its reverse (132130110131), we get a palindrome (263141141362).

The spelling of 131011031231 in words is "one hundred thirty-one billion, eleven million, thirty-one thousand, two hundred thirty-one".