1213221323203 has 2 divisors, whose sum is σ = 1213221323204. Its totient is φ = 1213221323202.

The previous prime is 1213221323177. The next prime is 1213221323233. The reversal of 1213221323203 is 3023231223121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213221323203 - 2³⁷ = 1075782369731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213221323233) 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, 606610661601 + 606610661602.

It is an arithmetic number, because the mean of its divisors is an integer number (606610661602).

Almost surely, 2^{1213221323203} is an apocalyptic number.

1213221323203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213221323203 is an equidigital number, since it uses as much as digits as its factorization.

1213221323203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1213221323203 its reverse (3023231223121), we get a palindrome (4236452546324).

The spelling of 1213221323203 in words is "one trillion, two hundred thirteen billion, two hundred twenty-one million, three hundred twenty-three thousand, two hundred three".