1321213321133 has 2 divisors, whose sum is σ = 1321213321134. Its totient is φ = 1321213321132.

The previous prime is 1321213321093. The next prime is 1321213321147. The reversal of 1321213321133 is 3311233121231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 936710394244 + 384502926889 = 967838^2 + 620083^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321213321133 - 2¹⁰ = 1321213320109 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 (1321215321133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660606660566 + 660606660567.

It is an arithmetic number, because the mean of its divisors is an integer number (660606660567).

Almost surely, 2^{1321213321133} is an apocalyptic number.

It is an amenable number.

1321213321133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321213321133 is an equidigital number, since it uses as much as digits as its factorization.

1321213321133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

Adding to 1321213321133 its reverse (3311233121231), we get a palindrome (4632446442364).

The spelling of 1321213321133 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, three hundred twenty-one thousand, one hundred thirty-three".