131322312131 has 4 divisors (see below), whose sum is σ = 131395230264. Its totient is φ = 131249394000.

The previous prime is 131322312083. The next prime is 131322312161. The reversal of 131322312131 is 131213223131.

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 131322312131 - 2¹⁸ = 131322049987 is a prime.

It is a super-2 number, since 2×131322312131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131322312097 and 131322312106.

It is not an unprimeable number, because it can be changed into a prime (131322312161) 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, 36456365 + ... + 36459966.

It is an arithmetic number, because the mean of its divisors is an integer number (32848807566).

Almost surely, 2^131322312131 is an apocalyptic number.

131322312131 is a deficient number, since it is larger than the sum of its proper divisors (72918133).

131322312131 is an equidigital number, since it uses as much as digits as its factorization.

131322312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72918132.

The product of its digits is 648, while the sum is 23.

Adding to 131322312131 its reverse (131213223131), we get a palindrome (262535535262).

The spelling of 131322312131 in words is "one hundred thirty-one billion, three hundred twenty-two million, three hundred twelve thousand, one hundred thirty-one".