1211233187233 has 2 divisors, whose sum is σ = 1211233187234. Its totient is φ = 1211233187232.

The previous prime is 1211233187209. The next prime is 1211233187237. The reversal of 1211233187233 is 3327813321121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 679541381649 + 531691805584 = 824343^2 + 729172^2 .

It is an emirp because it is prime and its reverse (3327813321121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211233187233 - 2²¹ = 1211231090081 is a prime.

It is a super-2 number, since 2×1211233187233² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211233187192 and 1211233187201.

It is not a weakly prime, because it can be changed into another prime (1211233187237) 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, 605616593616 + 605616593617.

It is an arithmetic number, because the mean of its divisors is an integer number (605616593617).

Almost surely, 2^{1211233187233} is an apocalyptic number.

It is an amenable number.

1211233187233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211233187233 is an equidigital number, since it uses as much as digits as its factorization.

1211233187233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The spelling of 1211233187233 in words is "one trillion, two hundred eleven billion, two hundred thirty-three million, one hundred eighty-seven thousand, two hundred thirty-three".