131122213213 has 2 divisors, whose sum is σ = 131122213214. Its totient is φ = 131122213212.

The previous prime is 131122213199. The next prime is 131122213303. The reversal of 131122213213 is 312312221131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108611111844 + 22511101369 = 329562^2 + 150037^2 .

It is an emirp because it is prime and its reverse (312312221131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131122213213 - 2⁹ = 131122212701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131122213813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65561106606 + 65561106607.

It is an arithmetic number, because the mean of its divisors is an integer number (65561106607).

Almost surely, 2^131122213213 is an apocalyptic number.

It is an amenable number.

131122213213 is a deficient number, since it is larger than the sum of its proper divisors (1).

131122213213 is an equidigital number, since it uses as much as digits as its factorization.

131122213213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

Adding to 131122213213 its reverse (312312221131), we get a palindrome (443434434344).

The spelling of 131122213213 in words is "one hundred thirty-one billion, one hundred twenty-two million, two hundred thirteen thousand, two hundred thirteen".