131220333313 has 2 divisors, whose sum is σ = 131220333314. Its totient is φ = 131220333312.

The previous prime is 131220333281. The next prime is 131220333323. The reversal of 131220333313 is 313333022131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122672961009 + 8547372304 = 350247^2 + 92452^2 .

It is a cyclic number.

It is not a de Polignac number, because 131220333313 - 2⁵ = 131220333281 is a prime.

It is not a weakly prime, because it can be changed into another prime (131220333323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65610166656 + 65610166657.

It is an arithmetic number, because the mean of its divisors is an integer number (65610166657).

Almost surely, 2^131220333313 is an apocalyptic number.

It is an amenable number.

131220333313 is a deficient number, since it is larger than the sum of its proper divisors (1).

131220333313 is an equidigital number, since it uses as much as digits as its factorization.

131220333313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 131220333313 its reverse (313333022131), we get a palindrome (444553355444).

The spelling of 131220333313 in words is "one hundred thirty-one billion, two hundred twenty million, three hundred thirty-three thousand, three hundred thirteen".