211100221091 has 8 divisors (see below), whose sum is σ = 215436788160. Its totient is φ = 206788940712.

The previous prime is 211100221061. The next prime is 211100221093. The reversal of 211100221091 is 190122001112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211100221091 - 2³⁴ = 193920351907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211100221093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6304805 + ... + 6338198.

It is an arithmetic number, because the mean of its divisors is an integer number (26929598520).

Almost surely, 2^211100221091 is an apocalyptic number.

211100221091 is a deficient number, since it is larger than the sum of its proper divisors (4336567069).

211100221091 is a wasteful number, since it uses less digits than its factorization.

211100221091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12643345.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 211100221091 in words is "two hundred eleven billion, one hundred million, two hundred twenty-one thousand, ninety-one".