1330202021 has 2 divisors, whose sum is σ = 1330202022. Its totient is φ = 1330202020.

The previous prime is 1330201997. The next prime is 1330202053. The reversal of 1330202021 is 1202020331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 974313796 + 355888225 = 31214^2 + 18865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1330202021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1330201987 and 1330202005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330232021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665101010 + 665101011.

It is an arithmetic number, because the mean of its divisors is an integer number (665101011).

Almost surely, 2^1330202021 is an apocalyptic number.

It is an amenable number.

1330202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330202021 is an equidigital number, since it uses as much as digits as its factorization.

1330202021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1330202021 is about 36471.9347032756. The cubic root of 1330202021 is about 1099.7801271281.

Adding to 1330202021 its reverse (1202020331), we get a palindrome (2532222352).

The spelling of 1330202021 in words is "one billion, three hundred thirty million, two hundred two thousand, twenty-one".