1300021013 has 2 divisors, whose sum is σ = 1300021014. Its totient is φ = 1300021012.

The previous prime is 1300021001. The next prime is 1300021049. The reversal of 1300021013 is 3101200031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 971070244 + 328950769 = 31162^2 + 18137^2 .

It is an emirp because it is prime and its reverse (3101200031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1300021013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1300020985 and 1300021003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1300021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650010506 + 650010507.

It is an arithmetic number, because the mean of its divisors is an integer number (650010507).

Almost surely, 2^1300021013 is an apocalyptic number.

It is an amenable number.

1300021013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1300021013 is an equidigital number, since it uses as much as digits as its factorization.

1300021013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1300021013 is about 36055.8041513430. The cubic root of 1300021013 is about 1091.3987633983.

Adding to 1300021013 its reverse (3101200031), we get a palindrome (4401221044).

The spelling of 1300021013 in words is "one billion, three hundred million, twenty-one thousand, thirteen".