1223321121013 has 2 divisors, whose sum is σ = 1223321121014. Its totient is φ = 1223321121012.

The previous prime is 1223321120981. The next prime is 1223321121019. The reversal of 1223321121013 is 3101211233221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 751727148484 + 471593972529 = 867022^2 + 686727^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223321121013 - 2⁵ = 1223321120981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223321121019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611660560506 + 611660560507.

It is an arithmetic number, because the mean of its divisors is an integer number (611660560507).

Almost surely, 2^{1223321121013} is an apocalyptic number.

It is an amenable number.

1223321121013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223321121013 is an equidigital number, since it uses as much as digits as its factorization.

1223321121013 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 22.

Adding to 1223321121013 its reverse (3101211233221), we get a palindrome (4324532354234).

The spelling of 1223321121013 in words is "one trillion, two hundred twenty-three billion, three hundred twenty-one million, one hundred twenty-one thousand, thirteen".