1212213313 has 2 divisors, whose sum is σ = 1212213314. Its totient is φ = 1212213312.

The previous prime is 1212213293. The next prime is 1212213337. The reversal of 1212213313 is 3133122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1199375424 + 12837889 = 34632^2 + 3583^2 .

It is an emirp because it is prime and its reverse (3133122121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212213313 is a prime.

It is a super-3 number, since 3×1212213313³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1212219313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606106656 + 606106657.

It is an arithmetic number, because the mean of its divisors is an integer number (606106657).

Almost surely, 2^1212213313 is an apocalyptic number.

It is an amenable number.

1212213313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212213313 is an equidigital number, since it uses as much as digits as its factorization.

1212213313 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 1212213313 is about 34816.8538641848. The cubic root of 1212213313 is about 1066.2515686378.

Adding to 1212213313 its reverse (3133122121), we get a palindrome (4345335434).

The spelling of 1212213313 in words is "one billion, two hundred twelve million, two hundred thirteen thousand, three hundred thirteen".