65112115121 has 16 divisors (see below), whose sum is σ = 70372143360. Its totient is φ = 60059778240.

The previous prime is 65112115091. The next prime is 65112115139. The reversal of 65112115121 is 12151121156.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65112115121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65112115171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488156 + ... + 607058.

It is an arithmetic number, because the mean of its divisors is an integer number (4398258960).

Almost surely, 2^65112115121 is an apocalyptic number.

It is an amenable number.

65112115121 is a deficient number, since it is larger than the sum of its proper divisors (5260028239).

65112115121 is a wasteful number, since it uses less digits than its factorization.

65112115121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119776.

The product of its digits is 600, while the sum is 26.

Adding to 65112115121 its reverse (12151121156), we get a palindrome (77263236277).

The spelling of 65112115121 in words is "sixty-five billion, one hundred twelve million, one hundred fifteen thousand, one hundred twenty-one".