131344231121 has 4 divisors (see below), whose sum is σ = 131349689700. Its totient is φ = 131338772544.

The previous prime is 131344230973. The next prime is 131344231133. The reversal of 131344231121 is 121132443131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121132443131 = 7 ⋅17304634733.

It can be written as a sum of positive squares in 2 ways, for example, as 115898712721 + 15445518400 = 340439^2 + 124280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131344231121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131344231621) 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, 2693036 + ... + 2741373.

It is an arithmetic number, because the mean of its divisors is an integer number (32837422425).

Almost surely, 2^131344231121 is an apocalyptic number.

It is an amenable number.

131344231121 is a deficient number, since it is larger than the sum of its proper divisors (5458579).

131344231121 is an equidigital number, since it uses as much as digits as its factorization.

131344231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5458578.

The product of its digits is 1728, while the sum is 26.

Adding to 131344231121 its reverse (121132443131), we get a palindrome (252476674252).

The spelling of 131344231121 in words is "one hundred thirty-one billion, three hundred forty-four million, two hundred thirty-one thousand, one hundred twenty-one".