216520800034121 has 8 divisors (see below), whose sum is σ = 237653616548064. Its totient is φ = 195629501423520.

The previous prime is 216520800034109. The next prime is 216520800034153. The reversal of 216520800034121 is 121430008025612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216520800034121 - 2³⁰ = 216519726292297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216520800034171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60379473956 + ... + 60379477541.

It is an arithmetic number, because the mean of its divisors is an integer number (29706702068508).

Almost surely, 2^{216520800034121} is an apocalyptic number.

It is an amenable number.

216520800034121 is a deficient number, since it is larger than the sum of its proper divisors (21132816513943).

216520800034121 is a wasteful number, since it uses less digits than its factorization.

216520800034121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120758951671.

The product of its (nonzero) digits is 23040, while the sum is 35.

Adding to 216520800034121 its reverse (121430008025612), we get a palindrome (337950808059733).

The spelling of 216520800034121 in words is "two hundred sixteen trillion, five hundred twenty billion, eight hundred million, thirty-four thousand, one hundred twenty-one".