216221818882999 has 2 divisors, whose sum is σ = 216221818883000. Its totient is φ = 216221818882998.

The previous prime is 216221818882957. The next prime is 216221818883033. The reversal of 216221818882999 is 999288818122612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216221818882999 - 2¹⁷ = 216221818751927 is a prime.

It is a super-2 number, since 2×216221818882999² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216221818882799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108110909441499 + 108110909441500.

It is an arithmetic number, because the mean of its divisors is an integer number (108110909441500).

Almost surely, 2^{216221818882999} is an apocalyptic number.

216221818882999 is a deficient number, since it is larger than the sum of its proper divisors (1).

216221818882999 is an equidigital number, since it uses as much as digits as its factorization.

216221818882999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 286654464, while the sum is 76.

The spelling of 216221818882999 in words is "two hundred sixteen trillion, two hundred twenty-one billion, eight hundred eighteen million, eight hundred eighty-two thousand, nine hundred ninety-nine".