11011221112 has 32 divisors (see below), whose sum is σ = 21559063680. Its totient is φ = 5262479200.

The previous prime is 11011221097. The next prime is 11011221131. The reversal of 11011221112 is 21112211011.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11011221092 and 11011221101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246363 + ... + 287605.

It is an arithmetic number, because the mean of its divisors is an integer number (673720740).

Almost surely, 2^11011221112 is an apocalyptic number.

It is an amenable number.

11011221112 is a deficient number, since it is larger than the sum of its proper divisors (10547842568).

11011221112 is a wasteful number, since it uses less digits than its factorization.

11011221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42723 (or 42719 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11011221112 its reverse (21112211011), we get a palindrome (32123432123).

The spelling of 11011221112 in words is "eleven billion, eleven million, two hundred twenty-one thousand, one hundred twelve".