100101216555 has 32 divisors (see below), whose sum is σ = 178088800320. Its totient is φ = 53347991040.

The previous prime is 100101216521. The next prime is 100101216557. The reversal of 100101216555 is 555612101001.

100101216555 is a `hidden beast` number, since 1 + 0 + 0 + 1 + 0 + 1 + 2 + 1 + 655 + 5 = 666.

It is not a de Polignac number, because 100101216555 - 2¹⁶ = 100101151019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (100101216557) 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 in 31 ways as a sum of consecutive naturals, for example, 88672 + ... + 456141.

It is an arithmetic number, because the mean of its divisors is an integer number (5565275010).

Almost surely, 2^100101216555 is an apocalyptic number.

100101216555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100101216555 is a deficient number, since it is larger than the sum of its proper divisors (77987583765).

100101216555 is a wasteful number, since it uses less digits than its factorization.

100101216555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546188 (or 546182 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

Adding to 100101216555 its reverse (555612101001), we get a palindrome (655713317556).

The spelling of 100101216555 in words is "one hundred billion, one hundred one million, two hundred sixteen thousand, five hundred fifty-five".