11221201210221 has 16 divisors (see below), whose sum is σ = 16626670849600. Its totient is φ = 7479599731344.

The previous prime is 11221201210213. The next prime is 11221201210291. The reversal of 11221201210221 is 12201210212211.

11221201210221 is a `hidden beast` number, since 1 + 1 + 221 + 201 + 21 + 0 + 221 = 666.

It is not a de Polignac number, because 11221201210221 - 2³ = 11221201210213 is a prime.

It is a super-4 number, since 4×11221201210221⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11221201210194 and 11221201210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221201210211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33191911 + ... + 33528276.

It is an arithmetic number, because the mean of its divisors is an integer number (1039166928100).

Almost surely, 2^{11221201210221} is an apocalyptic number.

It is an amenable number.

11221201210221 is a deficient number, since it is larger than the sum of its proper divisors (5405469639379).

11221201210221 is an equidigital number, since it uses as much as digits as its factorization.

11221201210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66726425 (or 66726419 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11221201210221 its reverse (12201210212211), we get a palindrome (23422411422432).

The spelling of 11221201210221 in words is "eleven trillion, two hundred twenty-one billion, two hundred one million, two hundred ten thousand, two hundred twenty-one".