1330020321221 has 2 divisors, whose sum is σ = 1330020321222. Its totient is φ = 1330020321220.

The previous prime is 1330020321169. The next prime is 1330020321239. The reversal of 1330020321221 is 1221230200331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 857687140996 + 472333180225 = 926114^2 + 687265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330020321221 - 2¹⁰ = 1330020320197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1330020321193 and 1330020321202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330020321121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665010160610 + 665010160611.

It is an arithmetic number, because the mean of its divisors is an integer number (665010160611).

Almost surely, 2^{1330020321221} is an apocalyptic number.

It is an amenable number.

1330020321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330020321221 is an equidigital number, since it uses as much as digits as its factorization.

1330020321221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1330020321221 its reverse (1221230200331), we get a palindrome (2551250521552).

The spelling of 1330020321221 in words is "one trillion, three hundred thirty billion, twenty million, three hundred twenty-one thousand, two hundred twenty-one".