11221211012201 has 4 divisors (see below), whose sum is σ = 11347292034900. Its totient is φ = 11095129989504.

The previous prime is 11221211012191. The next prime is 11221211012317. The reversal of 11221211012201 is 10221011212211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5659160452201 + 5562050560000 = 2378899^2 + 2358400^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221211012201 - 2¹⁰ = 11221211011177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11221211012201.

It is not an unprimeable number, because it can be changed into a prime (11221211012101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63040511216 + ... + 63040511393.

It is an arithmetic number, because the mean of its divisors is an integer number (2836823008725).

Almost surely, 2^{11221211012201} is an apocalyptic number.

It is an amenable number.

11221211012201 is a deficient number, since it is larger than the sum of its proper divisors (126081022699).

11221211012201 is an equidigital number, since it uses as much as digits as its factorization.

11221211012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126081022698.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11221211012201 its reverse (10221011212211), we get a palindrome (21442222224412).

The spelling of 11221211012201 in words is "eleven trillion, two hundred twenty-one billion, two hundred eleven million, twelve thousand, two hundred one".