216056121 has 8 divisors (see below), whose sum is σ = 288892320. Its totient is φ = 143628672.

The previous prime is 216056117. The next prime is 216056153. The reversal of 216056121 is 121650612.

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

It is not a de Polignac number, because 216056121 - 2² = 216056117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216056091 and 216056100.

It is not an unprimeable number, because it can be changed into a prime (216056821) 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, 100951 + ... + 103068.

It is an arithmetic number, because the mean of its divisors is an integer number (36111540).

Almost surely, 2^216056121 is an apocalyptic number.

It is an amenable number.

216056121 is a deficient number, since it is larger than the sum of its proper divisors (72836199).

216056121 is a wasteful number, since it uses less digits than its factorization.

216056121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204375.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 216056121 is about 14698.8476078909. The cubic root of 216056121 is about 600.0519593891.

The spelling of 216056121 in words is "two hundred sixteen million, fifty-six thousand, one hundred twenty-one".