131031231011 has 4 divisors (see below), whose sum is σ = 131066392032. Its totient is φ = 130996069992.

The previous prime is 131031230971. The next prime is 131031231013. The reversal of 131031231011 is 110132130131.

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-131031231011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131031231013) 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, 17574920 + ... + 17582373.

It is an arithmetic number, because the mean of its divisors is an integer number (32766598008).

Almost surely, 2^131031231011 is an apocalyptic number.

131031231011 is a deficient number, since it is larger than the sum of its proper divisors (35161021).

131031231011 is an equidigital number, since it uses as much as digits as its factorization.

131031231011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35161020.

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

Adding to 131031231011 its reverse (110132130131), we get a palindrome (241163361142).

The spelling of 131031231011 in words is "one hundred thirty-one billion, thirty-one million, two hundred thirty-one thousand, eleven".