11221212001 has 2 divisors, whose sum is σ = 11221212002. Its totient is φ = 11221212000.

The previous prime is 11221211983. The next prime is 11221212007. The reversal of 11221212001 is 10021212211.

11221212001 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., 10587381025 + 633830976 = 102895^2 + 25176^2 .

It is an emirp because it is prime and its reverse (10021212211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11221212001 - 2²³ = 11212823393 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221212007) 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, 5610606000 + 5610606001.

It is an arithmetic number, because the mean of its divisors is an integer number (5610606001).

Almost surely, 2^11221212001 is an apocalyptic number.

It is an amenable number.

11221212001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221212001 is an equidigital number, since it uses as much as digits as its factorization.

11221212001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11221212001 its reverse (10021212211), we get a palindrome (21242424212).

The spelling of 11221212001 in words is "eleven billion, two hundred twenty-one million, two hundred twelve thousand, one".