1321233222011 has 2 divisors, whose sum is σ = 1321233222012. Its totient is φ = 1321233222010.

The previous prime is 1321233221999. The next prime is 1321233222013. The reversal of 1321233222011 is 1102223321231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321233222011 - 2¹⁸ = 1321232959867 is a prime.

Together with 1321233222013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1321233222013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660616611005 + 660616611006.

It is an arithmetic number, because the mean of its divisors is an integer number (660616611006).

Almost surely, 2^{1321233222011} is an apocalyptic number.

1321233222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321233222011 is an equidigital number, since it uses as much as digits as its factorization.

1321233222011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1321233222011 its reverse (1102223321231), we get a palindrome (2423456543242).

The spelling of 1321233222011 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-three million, two hundred twenty-two thousand, eleven".