135306266321 has 2 divisors, whose sum is σ = 135306266322. Its totient is φ = 135306266320.

The previous prime is 135306266311. The next prime is 135306266323. The reversal of 135306266321 is 123662603531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100466177296 + 34840089025 = 316964^2 + 186655^2 .

It is a cyclic number.

It is not a de Polignac number, because 135306266321 - 2¹⁴ = 135306249937 is a prime.

Together with 135306266323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135306266323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67653133160 + 67653133161.

It is an arithmetic number, because the mean of its divisors is an integer number (67653133161).

Almost surely, 2^135306266321 is an apocalyptic number.

It is an amenable number.

135306266321 is a deficient number, since it is larger than the sum of its proper divisors (1).

135306266321 is an equidigital number, since it uses as much as digits as its factorization.

135306266321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 38.

Adding to 135306266321 its reverse (123662603531), we get a palindrome (258968869852).

The spelling of 135306266321 in words is "one hundred thirty-five billion, three hundred six million, two hundred sixty-six thousand, three hundred twenty-one".