131303112123221 has 2 divisors, whose sum is σ = 131303112123222. Its totient is φ = 131303112123220.

The previous prime is 131303112123187. The next prime is 131303112123251. The reversal of 131303112123221 is 122321211303131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95447135787025 + 35855976336196 = 9769705^2 + 5987986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131303112123221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131303112123251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65651556061610 + 65651556061611.

It is an arithmetic number, because the mean of its divisors is an integer number (65651556061611).

Almost surely, 2^{131303112123221} is an apocalyptic number.

It is an amenable number.

131303112123221 is a deficient number, since it is larger than the sum of its proper divisors (1).

131303112123221 is an equidigital number, since it uses as much as digits as its factorization.

131303112123221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 131303112123221 its reverse (122321211303131), we get a palindrome (253624323426352).

The spelling of 131303112123221 in words is "one hundred thirty-one trillion, three hundred three billion, one hundred twelve million, one hundred twenty-three thousand, two hundred twenty-one".