11221212313 has 2 divisors, whose sum is σ = 11221212314. Its totient is φ = 11221212312.

The previous prime is 11221212251. The next prime is 11221212319. The reversal of 11221212313 is 31321212211.

11221212313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11213327449 + 7884864 = 105893^2 + 2808^2 .

It is an emirp because it is prime and its reverse (31321212211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11221212313 - 2²¹ = 11219115161 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221212319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610606156 + 5610606157.

It is an arithmetic number, because the mean of its divisors is an integer number (5610606157).

Almost surely, 2^11221212313 is an apocalyptic number.

It is an amenable number.

11221212313 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221212313 is an equidigital number, since it uses as much as digits as its factorization.

11221212313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

Adding to 11221212313 its reverse (31321212211), we get a palindrome (42542424524).

The spelling of 11221212313 in words is "eleven billion, two hundred twenty-one million, two hundred twelve thousand, three hundred thirteen".