216565101111 has 8 divisors (see below), whose sum is σ = 289356295680. Its totient is φ = 144075320312.

The previous prime is 216565101083. The next prime is 216565101121. The reversal of 216565101111 is 111101565612.

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 216565101111 - 2⁵ = 216565101079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216565101121) 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, 75351765 + ... + 75354638.

It is an arithmetic number, because the mean of its divisors is an integer number (36169536960).

Almost surely, 2^216565101111 is an apocalyptic number.

216565101111 is a deficient number, since it is larger than the sum of its proper divisors (72791194569).

216565101111 is a wasteful number, since it uses less digits than its factorization.

216565101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150706885.

The product of its (nonzero) digits is 1800, while the sum is 30.

Adding to 216565101111 its reverse (111101565612), we get a palindrome (327666666723).

The spelling of 216565101111 in words is "two hundred sixteen billion, five hundred sixty-five million, one hundred one thousand, one hundred eleven".