211120221 has 16 divisors (see below), whose sum is σ = 304035200. Its totient is φ = 129539520.

The previous prime is 211120219. The next prime is 211120223. The reversal of 211120221 is 122021112.

211120221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211120219) and next prime (211120223).

It is not a de Polignac number, because 211120221 - 2¹ = 211120219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211120197 and 211120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211120223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5856 + ... + 21366.

It is an arithmetic number, because the mean of its divisors is an integer number (19002200).

Almost surely, 2^211120221 is an apocalyptic number.

It is an amenable number.

211120221 is a deficient number, since it is larger than the sum of its proper divisors (92914979).

211120221 is a wasteful number, since it uses less digits than its factorization.

211120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15876.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 211120221 is about 14529.9766345304. The cubic root of 211120221 is about 595.4472272568.

Adding to 211120221 its reverse (122021112), we get a palindrome (333141333).

The spelling of 211120221 in words is "two hundred eleven million, one hundred twenty thousand, two hundred twenty-one".