1320221334413 has 2 divisors, whose sum is σ = 1320221334414. Its totient is φ = 1320221334412.

The previous prime is 1320221334401. The next prime is 1320221334451. The reversal of 1320221334413 is 3144331220231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 906157397929 + 414063936484 = 951923^2 + 643478^2 .

It is an emirp because it is prime and its reverse (3144331220231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320221334413 - 2²⁰ = 1320220285837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320221334463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660110667206 + 660110667207.

It is an arithmetic number, because the mean of its divisors is an integer number (660110667207).

Almost surely, 2^{1320221334413} is an apocalyptic number.

It is an amenable number.

1320221334413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320221334413 is an equidigital number, since it uses as much as digits as its factorization.

1320221334413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 1320221334413 its reverse (3144331220231), we get a palindrome (4464552554644).

The spelling of 1320221334413 in words is "one trillion, three hundred twenty billion, two hundred twenty-one million, three hundred thirty-four thousand, four hundred thirteen".