102216210665 has 16 divisors (see below), whose sum is σ = 122913618960. Its totient is φ = 81603624960.

The previous prime is 102216210647. The next prime is 102216210667. The reversal of 102216210665 is 566012612201.

It can be written as a sum of positive squares in 8 ways, for example, as 2463831769 + 99752378896 = 49637^2 + 315836^2 .

It is not a de Polignac number, because 102216210665 - 2⁸ = 102216210409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102216210667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15232331 + ... + 15239039.

It is an arithmetic number, because the mean of its divisors is an integer number (7682101185).

Almost surely, 2^102216210665 is an apocalyptic number.

It is an amenable number.

102216210665 is a deficient number, since it is larger than the sum of its proper divisors (20697408295).

102216210665 is an equidigital number, since it uses as much as digits as its factorization.

102216210665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12572.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 102216210665 its reverse (566012612201), we get a palindrome (668228822866).

The spelling of 102216210665 in words is "one hundred two billion, two hundred sixteen million, two hundred ten thousand, six hundred sixty-five".