221411 has 2 divisors, whose sum is σ = 221412. Its totient is φ = 221410.

The previous prime is 221401. The next prime is 221413. The reversal of 221411 is 114122.

221411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221411 is a prime.

It is a Sophie Germain prime.

Together with 221413, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 221392 and 221401.

It is not a weakly prime, because it can be changed into another prime (221413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110705 + 110706.

It is an arithmetic number, because the mean of its divisors is an integer number (110706).

2²²¹⁴¹¹ is an apocalyptic number.

221411 is a deficient number, since it is larger than the sum of its proper divisors (1).

221411 is an equidigital number, since it uses as much as digits as its factorization.

221411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16, while the sum is 11.

The square root of 221411 is about 470.5433030020. The cubic root of 221411 is about 60.4968921291.

Adding to 221411 its reverse (114122), we get a palindrome (335533).

The spelling of 221411 in words is "two hundred twenty-one thousand, four hundred eleven", and thus it is an iban number.