11121111222 has 32 divisors (see below), whose sum is σ = 24044283648. Its totient is φ = 3408863136.

The previous prime is 11121111173. The next prime is 11121111247. The reversal of 11121111222 is 22211112111.

It is a happy number.

It is a super-2 number, since 2×11121111222² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250548 + ... + 291575.

It is an arithmetic number, because the mean of its divisors is an integer number (751383864).

Almost surely, 2^11121111222 is an apocalyptic number.

11121111222 is an abundant number, since it is smaller than the sum of its proper divisors (12923172426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11121111222 is a wasteful number, since it uses less digits than its factorization.

11121111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542404.

The product of its digits is 16, while the sum is 15.

Adding to 11121111222 its reverse (22211112111), we get a palindrome (33332223333).

The spelling of 11121111222 in words is "eleven billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-two".