211121021122211 has 4 divisors (see below), whose sum is σ = 211366796467800. Its totient is φ = 210875245776624.

The previous prime is 211121021122171. The next prime is 211121021122243. The reversal of 211121021122211 is 112221120121112.

It is a happy number.

211121021122211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211121021122211 - 2³⁰ = 211119947380387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121021122111) 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, 122887671506 + ... + 122887673223.

It is an arithmetic number, because the mean of its divisors is an integer number (52841699116950).

Almost surely, 2^{211121021122211} is an apocalyptic number.

211121021122211 is a deficient number, since it is larger than the sum of its proper divisors (245775345589).

211121021122211 is an equidigital number, since it uses as much as digits as its factorization.

211121021122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245775345588.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211121021122211 its reverse (112221120121112), we get a palindrome (323342141243323).

The spelling of 211121021122211 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, two hundred eleven".