11011001022221 has 16 divisors (see below), whose sum is σ = 11095968384000. Its totient is φ = 10926198864000.

The previous prime is 11011001022199. The next prime is 11011001022223. The reversal of 11011001022221 is 12222010011011.

It is a cyclic number.

It is not a de Polignac number, because 11011001022221 - 2¹⁸ = 11011000760077 is a prime.

It is a super-2 number, since 2×11011001022221² (a number of 27 digits) contains 22 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 = 11011001022196 and 11011001022205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011001022223) 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, 606023225 + ... + 606041393.

It is an arithmetic number, because the mean of its divisors is an integer number (693498024000).

Almost surely, 2^{11011001022221} is an apocalyptic number.

It is an amenable number.

11011001022221 is a deficient number, since it is larger than the sum of its proper divisors (84967361779).

11011001022221 is a wasteful number, since it uses less digits than its factorization.

11011001022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22460.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11011001022221 its reverse (12222010011011), we get a palindrome (23233011033232).

The spelling of 11011001022221 in words is "eleven trillion, eleven billion, one million, twenty-two thousand, two hundred twenty-one".