11211221201 has 2 divisors, whose sum is σ = 11211221202. Its totient is φ = 11211221200.

The previous prime is 11211221191. The next prime is 11211221221. The reversal of 11211221201 is 10212211211.

11211221201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10077148225 + 1134072976 = 100385^2 + 33676^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211221201 - 2⁶ = 11211221137 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211221221) 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, 5605610600 + 5605610601.

It is an arithmetic number, because the mean of its divisors is an integer number (5605610601).

Almost surely, 2^11211221201 is an apocalyptic number.

It is an amenable number.

11211221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211221201 is an equidigital number, since it uses as much as digits as its factorization.

11211221201 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 14.

Adding to 11211221201 its reverse (10212211211), we get a palindrome (21423432412).

The spelling of 11211221201 in words is "eleven billion, two hundred eleven million, two hundred twenty-one thousand, two hundred one".