100665216091 has 12 divisors (see below), whose sum is σ = 112429888920. Its totient is φ = 89385586080.

The previous prime is 100665216061. The next prime is 100665216103. The reversal of 100665216091 is 190612566001.

It is not a de Polignac number, because 100665216091 - 2¹³ = 100665207899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100665216091.

It is not an unprimeable number, because it can be changed into a prime (100665216031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2454346 + ... + 2495023.

It is an arithmetic number, because the mean of its divisors is an integer number (9369157410).

Almost surely, 2^100665216091 is an apocalyptic number.

100665216091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100665216091 is a deficient number, since it is larger than the sum of its proper divisors (11764672829).

100665216091 is an equidigital number, since it uses as much as digits as its factorization.

100665216091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949466 (or 4949423 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 100665216091 in words is "one hundred billion, six hundred sixty-five million, two hundred sixteen thousand, ninety-one".