11116670820221 has 4 divisors (see below), whose sum is σ = 11116678091100. Its totient is φ = 11116663549344.

The previous prime is 11116670820217. The next prime is 11116670820223. The reversal of 11116670820221 is 12202807661111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5112279271225 + 6004391548996 = 2261035^2 + 2450386^2 .

It is a cyclic number.

It is not a de Polignac number, because 11116670820221 - 2² = 11116670820217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11116670820223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355856 + ... + 4728633.

It is an arithmetic number, because the mean of its divisors is an integer number (2779169522775).

Almost surely, 2^{11116670820221} is an apocalyptic number.

It is an amenable number.

11116670820221 is a deficient number, since it is larger than the sum of its proper divisors (7270879).

11116670820221 is an equidigital number, since it uses as much as digits as its factorization.

11116670820221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7270878.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 11116670820221 in words is "eleven trillion, one hundred sixteen billion, six hundred seventy million, eight hundred twenty thousand, two hundred twenty-one".