216111168001 has 4 divisors (see below), whose sum is σ = 216199487232. Its totient is φ = 216022848772.

The previous prime is 216111167959. The next prime is 216111168011. The reversal of 216111168001 is 100861111612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216111168001 - 2³⁷ = 78672214529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216111168011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44155945 + ... + 44160838.

It is an arithmetic number, because the mean of its divisors is an integer number (54049871808).

Almost surely, 2^216111168001 is an apocalyptic number.

It is an amenable number.

216111168001 is a deficient number, since it is larger than the sum of its proper divisors (88319231).

216111168001 is an equidigital number, since it uses as much as digits as its factorization.

216111168001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88319230.

The product of its (nonzero) digits is 576, while the sum is 28.

Adding to 216111168001 its reverse (100861111612), we get a palindrome (316972279613).

The spelling of 216111168001 in words is "two hundred sixteen billion, one hundred eleven million, one hundred sixty-eight thousand, one".