10011201122221 has 4 divisors (see below), whose sum is σ = 10781293516252. Its totient is φ = 9241108728192.

The previous prime is 10011201122099. The next prime is 10011201122243. The reversal of 10011201122221 is 12222110211001.

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 1375014212100 + 8636186910121 = 1172610^2 + 2938739^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011201122221 - 2³⁹ = 9461445308333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10011201122195 and 10011201122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011201122521) 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 3 ways as a sum of consecutive naturals, for example, 385046196996 + ... + 385046197021.

It is an arithmetic number, because the mean of its divisors is an integer number (2695323379063).

Almost surely, 2^{10011201122221} is an apocalyptic number.

It is an amenable number.

10011201122221 is a deficient number, since it is larger than the sum of its proper divisors (770092394031).

10011201122221 is an equidigital number, since it uses as much as digits as its factorization.

10011201122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770092394030.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10011201122221 its reverse (12222110211001), we get a palindrome (22233311333222).

The spelling of 10011201122221 in words is "ten trillion, eleven billion, two hundred one million, one hundred twenty-two thousand, two hundred twenty-one".