11022222221 has 16 divisors (see below), whose sum is σ = 12516638400. Its totient is φ = 9642417408.

The previous prime is 11022222179. The next prime is 11022222227. The reversal of 11022222221 is 12222222011.

It is a happy number.

11022222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11022222221 - 2²⁶ = 10955113357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11022222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022222227) 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 15 ways as a sum of consecutive naturals, for example, 304811 + ... + 339048.

It is an arithmetic number, because the mean of its divisors is an integer number (782289900).

Almost surely, 2^11022222221 is an apocalyptic number.

It is an amenable number.

11022222221 is a deficient number, since it is larger than the sum of its proper divisors (1494416179).

11022222221 is a wasteful number, since it uses less digits than its factorization.

11022222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643948.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 11022222221 its reverse (12222222011), we get a palindrome (23244444232).

The spelling of 11022222221 in words is "eleven billion, twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".