1330447021 has 2 divisors, whose sum is σ = 1330447022. Its totient is φ = 1330447020.

The previous prime is 1330446989. The next prime is 1330447087. The reversal of 1330447021 is 1207440331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1327509225 + 2937796 = 36435^2 + 1714^2 .

It is an emirp because it is prime and its reverse (1207440331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1330447021 - 2⁵ = 1330446989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330447721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665223510 + 665223511.

It is an arithmetic number, because the mean of its divisors is an integer number (665223511).

Almost surely, 2^1330447021 is an apocalyptic number.

It is an amenable number.

1330447021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330447021 is an equidigital number, since it uses as much as digits as its factorization.

1330447021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 1330447021 is about 36475.2932955994. The cubic root of 1330447021 is about 1099.8476430859.

Adding to 1330447021 its reverse (1207440331), we get a palindrome (2537887352).

The spelling of 1330447021 in words is "one billion, three hundred thirty million, four hundred forty-seven thousand, twenty-one".