11221212347 has 2 divisors, whose sum is σ = 11221212348. Its totient is φ = 11221212346.

The previous prime is 11221212319. The next prime is 11221212403. The reversal of 11221212347 is 74321212211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11221212347 - 2²⁴ = 11204435131 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221212047) 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, 5610606173 + 5610606174.

It is an arithmetic number, because the mean of its divisors is an integer number (5610606174).

Almost surely, 2^11221212347 is an apocalyptic number.

11221212347 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221212347 is an equidigital number, since it uses as much as digits as its factorization.

11221212347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

Adding to 11221212347 its reverse (74321212211), we get a palindrome (85542424558).

The spelling of 11221212347 in words is "eleven billion, two hundred twenty-one million, two hundred twelve thousand, three hundred forty-seven".