411243221 has 2 divisors, whose sum is σ = 411243222. Its totient is φ = 411243220.

The previous prime is 411243211. The next prime is 411243223. The reversal of 411243221 is 122342114.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229371025 + 181872196 = 15145^2 + 13486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-411243221 is a prime.

Together with 411243223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 411243193 and 411243202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (411243223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205621610 + 205621611.

It is an arithmetic number, because the mean of its divisors is an integer number (205621611).

Almost surely, 2^411243221 is an apocalyptic number.

It is an amenable number.

411243221 is a deficient number, since it is larger than the sum of its proper divisors (1).

411243221 is an equidigital number, since it uses as much as digits as its factorization.

411243221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 20.

The square root of 411243221 is about 20279.1326491051. The cubic root of 411243221 is about 743.6460075774.

Adding to 411243221 its reverse (122342114), we get a palindrome (533585335).

The spelling of 411243221 in words is "four hundred eleven million, two hundred forty-three thousand, two hundred twenty-one".