131301320243221 has 2 divisors, whose sum is σ = 131301320243222. Its totient is φ = 131301320243220.

The previous prime is 131301320243213. The next prime is 131301320243231. The reversal of 131301320243221 is 122342023103131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128935707060196 + 2365613183025 = 11354986^2 + 1538055^2 .

It is a cyclic number.

It is not a de Polignac number, because 131301320243221 - 2³ = 131301320243213 is a prime.

It is a super-2 number, since 2×131301320243221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131301320243221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131301320243231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65650660121610 + 65650660121611.

It is an arithmetic number, because the mean of its divisors is an integer number (65650660121611).

Almost surely, 2^{131301320243221} is an apocalyptic number.

It is an amenable number.

131301320243221 is a deficient number, since it is larger than the sum of its proper divisors (1).

131301320243221 is an equidigital number, since it uses as much as digits as its factorization.

131301320243221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 131301320243221 its reverse (122342023103131), we get a palindrome (253643343346352).

The spelling of 131301320243221 in words is "one hundred thirty-one trillion, three hundred one billion, three hundred twenty million, two hundred forty-three thousand, two hundred twenty-one".