442221211 has 2 divisors, whose sum is σ = 442221212. Its totient is φ = 442221210.

The previous prime is 442221193. The next prime is 442221217. The reversal of 442221211 is 112122244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442221211 - 2⁵ = 442221179 is a prime.

It is not a weakly prime, because it can be changed into another prime (442221217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221110605 + 221110606.

It is an arithmetic number, because the mean of its divisors is an integer number (221110606).

Almost surely, 2^442221211 is an apocalyptic number.

442221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

442221211 is an equidigital number, since it uses as much as digits as its factorization.

442221211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256, while the sum is 19.

The square root of 442221211 is about 21029.0563506782. The cubic root of 442221211 is about 761.8682171876.

Adding to 442221211 its reverse (112122244), we get a palindrome (554343455).

The spelling of 442221211 in words is "four hundred forty-two million, two hundred twenty-one thousand, two hundred eleven".