1321220033311 has 2 divisors, whose sum is σ = 1321220033312. Its totient is φ = 1321220033310.

The previous prime is 1321220033299. The next prime is 1321220033317. The reversal of 1321220033311 is 1133300221231.

It is a strong prime.

It is an emirp because it is prime and its reverse (1133300221231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321220033311 - 2⁷ = 1321220033183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321220033317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660610016655 + 660610016656.

It is an arithmetic number, because the mean of its divisors is an integer number (660610016656).

Almost surely, 2^{1321220033311} is an apocalyptic number.

1321220033311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321220033311 is an equidigital number, since it uses as much as digits as its factorization.

1321220033311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1321220033311 its reverse (1133300221231), we get a palindrome (2454520254542).

The spelling of 1321220033311 in words is "one trillion, three hundred twenty-one billion, two hundred twenty million, thirty-three thousand, three hundred eleven".