16555221132211 has 2 divisors, whose sum is σ = 16555221132212. Its totient is φ = 16555221132210.

The previous prime is 16555221132199. The next prime is 16555221132239. The reversal of 16555221132211 is 11223112255561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16555221132211 - 2³⁵ = 16520861393843 is a prime.

It is not a weakly prime, because it can be changed into another prime (16555221132511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277610566105 + 8277610566106.

It is an arithmetic number, because the mean of its divisors is an integer number (8277610566106).

Almost surely, 2^{16555221132211} is an apocalyptic number.

16555221132211 is a deficient number, since it is larger than the sum of its proper divisors (1).

16555221132211 is an equidigital number, since it uses as much as digits as its factorization.

16555221132211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 37.

Adding to 16555221132211 its reverse (11223112255561), we get a palindrome (27778333387772).

The spelling of 16555221132211 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty-one million, one hundred thirty-two thousand, two hundred eleven".