11111121222 has 16 divisors (see below), whose sum is σ = 23529433392. Its totient is φ = 3485841920.

The previous prime is 11111121211. The next prime is 11111121247. The reversal of 11111121222 is 22212111111.

It is a happy number.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54466179 + ... + 54466382.

It is an arithmetic number, because the mean of its divisors is an integer number (1470589587).

Almost surely, 2^11111121222 is an apocalyptic number.

11111121222 is an abundant number, since it is smaller than the sum of its proper divisors (12418312170).

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

11111121222 is a wasteful number, since it uses less digits than its factorization.

11111121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108932583.

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

Adding to 11111121222 its reverse (22212111111), we get a palindrome (33323232333).

The spelling of 11111121222 in words is "eleven billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty-two".