221201339 has 2 divisors, whose sum is σ = 221201340. Its totient is φ = 221201338.

The previous prime is 221201333. The next prime is 221201359. The reversal of 221201339 is 933102122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221201339 - 2⁸ = 221201083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221201333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600669 + 110600670.

It is an arithmetic number, because the mean of its divisors is an integer number (110600670).

Almost surely, 2^221201339 is an apocalyptic number.

221201339 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201339 is an equidigital number, since it uses as much as digits as its factorization.

221201339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 221201339 is about 14872.8389690738. The cubic root of 221201339 is about 604.7779063224. Note that the first 3 decimals are identical.

The spelling of 221201339 in words is "two hundred twenty-one million, two hundred one thousand, three hundred thirty-nine".