1213221323233 has 2 divisors, whose sum is σ = 1213221323234. Its totient is φ = 1213221323232.

The previous prime is 1213221323203. The next prime is 1213221323261. The reversal of 1213221323233 is 3323231223121.

It is a happy number.

It is an a-pointer prime, because the next prime (1213221323261) can be obtained adding 1213221323233 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 830243525329 + 382977797904 = 911177^2 + 618852^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213221323233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213221323203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606610661616 + 606610661617.

It is an arithmetic number, because the mean of its divisors is an integer number (606610661617).

Almost surely, 2^{1213221323233} is an apocalyptic number.

It is an amenable number.

1213221323233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213221323233 is an equidigital number, since it uses as much as digits as its factorization.

1213221323233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 28.

Adding to 1213221323233 its reverse (3323231223121), we get a palindrome (4536452546354).

The spelling of 1213221323233 in words is "one trillion, two hundred thirteen billion, two hundred twenty-one million, three hundred twenty-three thousand, two hundred thirty-three".