131111566321 has 8 divisors (see below), whose sum is σ = 134331531264. Its totient is φ = 127892654880.

The previous prime is 131111566319. The next prime is 131111566349. The reversal of 131111566321 is 123665111131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131111566321 - 2¹ = 131111566319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131111516321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8421 + ... + 512146.

It is an arithmetic number, because the mean of its divisors is an integer number (16791441408).

Almost surely, 2^131111566321 is an apocalyptic number.

It is an amenable number.

131111566321 is a deficient number, since it is larger than the sum of its proper divisors (3219964943).

131111566321 is an equidigital number, since it uses as much as digits as its factorization.

131111566321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526751.

The product of its digits is 3240, while the sum is 31.

Adding to 131111566321 its reverse (123665111131), we get a palindrome (254776677452).

The spelling of 131111566321 in words is "one hundred thirty-one billion, one hundred eleven million, five hundred sixty-six thousand, three hundred twenty-one".