131111331121 has 4 divisors (see below), whose sum is σ = 131130644544. Its totient is φ = 131092017700.

The previous prime is 131111331119. The next prime is 131111331133. The reversal of 131111331121 is 121133111131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131111331121 - 2¹ = 131111331119 is a prime.

It is a super-4 number, since 4×131111331121⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131111338121) 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, 9646525 + ... + 9660106.

It is an arithmetic number, because the mean of its divisors is an integer number (32782661136).

Almost surely, 2^131111331121 is an apocalyptic number.

It is an amenable number.

131111331121 is a deficient number, since it is larger than the sum of its proper divisors (19313423).

131111331121 is an equidigital number, since it uses as much as digits as its factorization.

131111331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19313422.

The product of its digits is 54, while the sum is 19.

Adding to 131111331121 its reverse (121133111131), we get a palindrome (252244442252).

The spelling of 131111331121 in words is "one hundred thirty-one billion, one hundred eleven million, three hundred thirty-one thousand, one hundred twenty-one".