1211120211233 has 2 divisors, whose sum is σ = 1211120211234. Its totient is φ = 1211120211232.

The previous prime is 1211120211199. The next prime is 1211120211277. The reversal of 1211120211233 is 3321120211121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 900540265024 + 310579946209 = 948968^2 + 557297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211120211233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1211120214233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605560105616 + 605560105617.

It is an arithmetic number, because the mean of its divisors is an integer number (605560105617).

Almost surely, 2^{1211120211233} is an apocalyptic number.

It is an amenable number.

1211120211233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211120211233 is an equidigital number, since it uses as much as digits as its factorization.

1211120211233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1211120211233 its reverse (3321120211121), we get a palindrome (4532240422354).

The spelling of 1211120211233 in words is "one trillion, two hundred eleven billion, one hundred twenty million, two hundred eleven thousand, two hundred thirty-three".