65841432121 has 2 divisors, whose sum is σ = 65841432122. Its totient is φ = 65841432120.

The previous prime is 65841432101. The next prime is 65841432211. The reversal of 65841432121 is 12123414856.

65841432121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (65841432211) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47382405625 + 18459026496 = 217675^2 + 135864^2 .

It is a cyclic number.

It is not a de Polignac number, because 65841432121 - 2¹⁹ = 65840907833 is a prime.

It is a super-3 number, since 3×65841432121³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (65841432101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32920716060 + 32920716061.

It is an arithmetic number, because the mean of its divisors is an integer number (32920716061).

Almost surely, 2^65841432121 is an apocalyptic number.

It is an amenable number.

65841432121 is a deficient number, since it is larger than the sum of its proper divisors (1).

65841432121 is an equidigital number, since it uses as much as digits as its factorization.

65841432121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 37.

Adding to 65841432121 its reverse (12123414856), we get a palindrome (77964846977).

The spelling of 65841432121 in words is "sixty-five billion, eight hundred forty-one million, four hundred thirty-two thousand, one hundred twenty-one".