1302130021321 has 2 divisors, whose sum is σ = 1302130021322. Its totient is φ = 1302130021320.

The previous prime is 1302130021307. The next prime is 1302130021343. The reversal of 1302130021321 is 1231200312031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 846282244096 + 455847777225 = 919936^2 + 675165^2 .

It is an emirp because it is prime and its reverse (1231200312031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1302130021321 - 2¹⁵ = 1302129988553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1302130021391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651065010660 + 651065010661.

It is an arithmetic number, because the mean of its divisors is an integer number (651065010661).

Almost surely, 2^{1302130021321} is an apocalyptic number.

It is an amenable number.

1302130021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302130021321 is an equidigital number, since it uses as much as digits as its factorization.

1302130021321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1302130021321 its reverse (1231200312031), we get a palindrome (2533330333352).

The spelling of 1302130021321 in words is "one trillion, three hundred two billion, one hundred thirty million, twenty-one thousand, three hundred twenty-one".