1212213133 has 2 divisors, whose sum is σ = 1212213134. Its totient is φ = 1212213132.

The previous prime is 1212213097. The next prime is 1212213151. The reversal of 1212213133 is 3313122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1211248809 + 964324 = 34803^2 + 982^2 .

It is an emirp because it is prime and its reverse (3313122121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212213133 - 2⁹ = 1212212621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212213133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212213193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606106566 + 606106567.

It is an arithmetic number, because the mean of its divisors is an integer number (606106567).

Almost surely, 2^1212213133 is an apocalyptic number.

It is an amenable number.

1212213133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212213133 is an equidigital number, since it uses as much as digits as its factorization.

1212213133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 1212213133 is about 34816.8512792297. The cubic root of 1212213133 is about 1066.2515158624.

Adding to 1212213133 its reverse (3313122121), we get a palindrome (4525335254).

The spelling of 1212213133 in words is "one billion, two hundred twelve million, two hundred thirteen thousand, one hundred thirty-three".