111222120012 has 12 divisors (see below), whose sum is σ = 259518280056. Its totient is φ = 37074040000.

The previous prime is 111222120011. The next prime is 111222120019. The reversal of 111222120012 is 210021222111.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 111222119973 and 111222120000.

It is not an unprimeable number, because it can be changed into a prime (111222120011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4634254989 + ... + 4634255012.

It is an arithmetic number, because the mean of its divisors is an integer number (21626523338).

Almost surely, 2^111222120012 is an apocalyptic number.

111222120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111222120012 is an abundant number, since it is smaller than the sum of its proper divisors (148296160044).

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

111222120012 is a wasteful number, since it uses less digits than its factorization.

111222120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9268510008 (or 9268510006 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111222120012 its reverse (210021222111), we get a palindrome (321243342123).

The spelling of 111222120012 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, twelve".