65121712101012 has 24 divisors (see below), whose sum is σ = 173657898936256. Its totient is φ = 18606203457408.

The previous prime is 65121712100999. The next prime is 65121712101031. The reversal of 65121712101012 is 21010121712156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387629238613 + ... + 387629238780.

Almost surely, 2^{65121712101012} is an apocalyptic number.

It is an amenable number.

65121712101012 is an abundant number, since it is smaller than the sum of its proper divisors (108536186835244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65121712101012 is a wasteful number, since it uses less digits than its factorization.

65121712101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775258477407 (or 775258477405 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 30.

Adding to 65121712101012 its reverse (21010121712156), we get a palindrome (86131833813168).

The spelling of 65121712101012 in words is "sixty-five trillion, one hundred twenty-one billion, seven hundred twelve million, one hundred one thousand, twelve".