2221021447 has 2 divisors, whose sum is σ = 2221021448. Its totient is φ = 2221021446.

The previous prime is 2221021417. The next prime is 2221021469. The reversal of 2221021447 is 7441201222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221021447 - 2¹⁹ = 2220497159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221021417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110510723 + 1110510724.

It is an arithmetic number, because the mean of its divisors is an integer number (1110510724).

Almost surely, 2^2221021447 is an apocalyptic number.

2221021447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221021447 is an equidigital number, since it uses as much as digits as its factorization.

2221021447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 2221021447 is about 47127.7142136132. The cubic root of 2221021447 is about 1304.7207942386.

Adding to 2221021447 its reverse (7441201222), we get a palindrome (9662222669).

The spelling of 2221021447 in words is "two billion, two hundred twenty-one million, twenty-one thousand, four hundred forty-seven".