65020321621243 has 2 divisors, whose sum is σ = 65020321621244. Its totient is φ = 65020321621242.

The previous prime is 65020321621219. The next prime is 65020321621253. The reversal of 65020321621243 is 34212612302056.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65020321621243 - 2²¹ = 65020319524091 is a prime.

It is not a weakly prime, because it can be changed into another prime (65020321621253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32510160810621 + 32510160810622.

It is an arithmetic number, because the mean of its divisors is an integer number (32510160810622).

Almost surely, 2^{65020321621243} is an apocalyptic number.

65020321621243 is a deficient number, since it is larger than the sum of its proper divisors (1).

65020321621243 is an equidigital number, since it uses as much as digits as its factorization.

65020321621243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 65020321621243 its reverse (34212612302056), we get a palindrome (99232933923299).

The spelling of 65020321621243 in words is "sixty-five trillion, twenty billion, three hundred twenty-one million, six hundred twenty-one thousand, two hundred forty-three".