216055622121 has 16 divisors (see below), whose sum is σ = 289300854528. Its totient is φ = 143424050000.

The previous prime is 216055622119. The next prime is 216055622129. The reversal of 216055622121 is 121226550612.

It is a cyclic number.

It is not a de Polignac number, because 216055622121 - 2¹ = 216055622119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216055622129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2862550 + ... + 2937056.

It is an arithmetic number, because the mean of its divisors is an integer number (18081303408).

Almost surely, 2^216055622121 is an apocalyptic number.

It is an amenable number.

216055622121 is a deficient number, since it is larger than the sum of its proper divisors (73245232407).

216055622121 is a wasteful number, since it uses less digits than its factorization.

216055622121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78612.

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 216055622121 in words is "two hundred sixteen billion, fifty-five million, six hundred twenty-two thousand, one hundred twenty-one".