1211120033213 has 2 divisors, whose sum is σ = 1211120033214. Its totient is φ = 1211120033212.

The previous prime is 1211120033129. The next prime is 1211120033231. The reversal of 1211120033213 is 3123300211121.

It is a happy number.

Together with next prime (1211120033231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1153039997209 + 58080036004 = 1073797^2 + 240998^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211120033213 - 2¹⁰ = 1211120032189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211120033713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605560016606 + 605560016607.

It is an arithmetic number, because the mean of its divisors is an integer number (605560016607).

Almost surely, 2^{1211120033213} is an apocalyptic number.

It is an amenable number.

1211120033213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211120033213 is an equidigital number, since it uses as much as digits as its factorization.

1211120033213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1211120033213 its reverse (3123300211121), we get a palindrome (4334420244334).

The spelling of 1211120033213 in words is "one trillion, two hundred eleven billion, one hundred twenty million, thirty-three thousand, two hundred thirteen".