21616205144211 has 24 divisors (see below), whose sum is σ = 31533016937760. Its totient is φ = 14267910960000.

The previous prime is 21616205144203. The next prime is 21616205144257. The reversal of 21616205144211 is 11244150261612.

21616205144211 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 6 + 205 + 1 + 442 + 1 + 1 = 666.

It is not a de Polignac number, because 21616205144211 - 2³ = 21616205144203 is a prime.

It is a super-2 number, since 2×21616205144211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21616205144291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82705786 + ... + 82966736.

It is an arithmetic number, because the mean of its divisors is an integer number (1313875705740).

Almost surely, 2^{21616205144211} is an apocalyptic number.

21616205144211 is a deficient number, since it is larger than the sum of its proper divisors (9916811793549).

21616205144211 is a wasteful number, since it uses less digits than its factorization.

21616205144211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352187 (or 352184 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 21616205144211 in words is "twenty-one trillion, six hundred sixteen billion, two hundred five million, one hundred forty-four thousand, two hundred eleven".