11011223221 has 8 divisors (see below), whose sum is σ = 11823153984. Its totient is φ = 10217538240.

The previous prime is 11011223177. The next prime is 11011223231. The reversal of 11011223221 is 12232211011.

11011223221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11011223221 - 2¹³ = 11011215029 is a prime.

It is a super-2 number, since 2×11011223221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011223195 and 11011223204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011223231) 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 in 7 ways as a sum of consecutive naturals, for example, 4560195 + ... + 4562608.

It is an arithmetic number, because the mean of its divisors is an integer number (1477894248).

Almost surely, 2^11011223221 is an apocalyptic number.

It is an amenable number.

11011223221 is a deficient number, since it is larger than the sum of its proper divisors (811930763).

11011223221 is an equidigital number, since it uses as much as digits as its factorization.

11011223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9122891.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11011223221 its reverse (12232211011), we get a palindrome (23243434232).

The spelling of 11011223221 in words is "eleven billion, eleven million, two hundred twenty-three thousand, two hundred twenty-one".