211300221 has 16 divisors (see below), whose sum is σ = 308026368. Its totient is φ = 127777200.

The previous prime is 211300217. The next prime is 211300223. The reversal of 211300221 is 122003112.

It is not a de Polignac number, because 211300221 - 2² = 211300217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211300197 and 211300206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211300223) 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, 8556 + ... + 22266.

It is an arithmetic number, because the mean of its divisors is an integer number (19251648).

Almost surely, 2^211300221 is an apocalyptic number.

It is an amenable number.

211300221 is a deficient number, since it is larger than the sum of its proper divisors (96726147).

211300221 is a wasteful number, since it uses less digits than its factorization.

211300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14192.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 211300221 is about 14536.1694060024. The cubic root of 211300221 is about 595.6164042535.

Adding to 211300221 its reverse (122003112), we get a palindrome (333303333).

The spelling of 211300221 in words is "two hundred eleven million, three hundred thousand, two hundred twenty-one".