11011111228 has 24 divisors (see below), whose sum is σ = 20777005088. Its totient is φ = 5075856576.

The previous prime is 11011111187. The next prime is 11011111229. The reversal of 11011111228 is 82211111011.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011111229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85851 + ... + 171442.

Almost surely, 2^11011111228 is an apocalyptic number.

It is an amenable number.

11011111228 is a deficient number, since it is larger than the sum of its proper divisors (9765893860).

11011111228 is a wasteful number, since it uses less digits than its factorization.

11011111228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258133 (or 258131 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 11011111228 its reverse (82211111011), we get a palindrome (93222222239).

The spelling of 11011111228 in words is "eleven billion, eleven million, one hundred eleven thousand, two hundred twenty-eight".