216122511361 has 8 divisors (see below), whose sum is σ = 227761009920. Its totient is φ = 204510375792.

The previous prime is 216122511313. The next prime is 216122511373. The reversal of 216122511361 is 163115221612.

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 216122511361 - 2¹³ = 216122503169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216122511161) 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, 6573910 + ... + 6606703.

It is an arithmetic number, because the mean of its divisors is an integer number (28470126240).

Almost surely, 2^216122511361 is an apocalyptic number.

It is an amenable number.

216122511361 is a deficient number, since it is larger than the sum of its proper divisors (11638498559).

216122511361 is a wasteful number, since it uses less digits than its factorization.

216122511361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13181495.

The product of its digits is 4320, while the sum is 31.

Adding to 216122511361 its reverse (163115221612), we get a palindrome (379237732973).

The spelling of 216122511361 in words is "two hundred sixteen billion, one hundred twenty-two million, five hundred eleven thousand, three hundred sixty-one".