65501065512121 has 4 divisors (see below), whose sum is σ = 65513941684992. Its totient is φ = 65488189339252.

The previous prime is 65501065512023. The next prime is 65501065512149. The reversal of 65501065512121 is 12121556010556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65501065512121 - 2⁴¹ = 63302042256569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65501065512161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6438078805 + ... + 6438088978.

It is an arithmetic number, because the mean of its divisors is an integer number (16378485421248).

Almost surely, 2^{65501065512121} is an apocalyptic number.

It is an amenable number.

65501065512121 is a deficient number, since it is larger than the sum of its proper divisors (12876172871).

65501065512121 is a wasteful number, since it uses less digits than its factorization.

65501065512121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12876172870.

The product of its (nonzero) digits is 90000, while the sum is 40.

The spelling of 65501065512121 in words is "sixty-five trillion, five hundred one billion, sixty-five million, five hundred twelve thousand, one hundred twenty-one".