131122213813 has 2 divisors, whose sum is σ = 131122213814. Its totient is φ = 131122213812.

The previous prime is 131122213799. The next prime is 131122213853. The reversal of 131122213813 is 318312221131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120209904369 + 10912309444 = 346713^2 + 104462^2 .

It is a cyclic number.

It is not a de Polignac number, because 131122213813 - 2²⁵ = 131088659381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131122213853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65561106906 + 65561106907.

It is an arithmetic number, because the mean of its divisors is an integer number (65561106907).

Almost surely, 2^131122213813 is an apocalyptic number.

It is an amenable number.

131122213813 is a deficient number, since it is larger than the sum of its proper divisors (1).

131122213813 is an equidigital number, since it uses as much as digits as its factorization.

131122213813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

Adding to 131122213813 its reverse (318312221131), we get a palindrome (449434434944).

The spelling of 131122213813 in words is "one hundred thirty-one billion, one hundred twenty-two million, two hundred thirteen thousand, eight hundred thirteen".