1221333203113 has 2 divisors, whose sum is σ = 1221333203114. Its totient is φ = 1221333203112.

The previous prime is 1221333203089. The next prime is 1221333203203. The reversal of 1221333203113 is 3113023331221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1205017739289 + 16315463824 = 1097733^2 + 127732^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221333203113 - 2⁹ = 1221333202601 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221333207113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610666601556 + 610666601557.

It is an arithmetic number, because the mean of its divisors is an integer number (610666601557).

Almost surely, 2^{1221333203113} is an apocalyptic number.

It is an amenable number.

1221333203113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221333203113 is an equidigital number, since it uses as much as digits as its factorization.

1221333203113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1221333203113 its reverse (3113023331221), we get a palindrome (4334356534334).

The spelling of 1221333203113 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-three million, two hundred three thousand, one hundred thirteen".