111222112212 has 18 divisors (see below), whose sum is σ = 281144783738. Its totient is φ = 37074037392.

The previous prime is 111222112187. The next prime is 111222112219. The reversal of 111222112212 is 212211222111.

It can be written as a sum of positive squares in only one way, i.e., 108223892676 + 2998219536 = 328974^2 + 54756^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222112219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1544751523 + ... + 1544751594.

Almost surely, 2^111222112212 is an apocalyptic number.

111222112212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111222112212 is an abundant number, since it is smaller than the sum of its proper divisors (169922671526).

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

111222112212 is a wasteful number, since it uses less digits than its factorization.

111222112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089503127 (or 3089503122 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 111222112212 its reverse (212211222111), we get a palindrome (323433334323).

The spelling of 111222112212 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twelve".