1211233203211 has 2 divisors, whose sum is σ = 1211233203212. Its totient is φ = 1211233203210.

The previous prime is 1211233203197. The next prime is 1211233203239. The reversal of 1211233203211 is 1123023321121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211233203211 - 2¹⁵ = 1211233170443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211233203511) 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, 605616601605 + 605616601606.

It is an arithmetic number, because the mean of its divisors is an integer number (605616601606).

Almost surely, 2^{1211233203211} is an apocalyptic number.

1211233203211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211233203211 is an equidigital number, since it uses as much as digits as its factorization.

1211233203211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1211233203211 its reverse (1123023321121), we get a palindrome (2334256524332).

The spelling of 1211233203211 in words is "one trillion, two hundred eleven billion, two hundred thirty-three million, two hundred three thousand, two hundred eleven".