111122223456 has 48 divisors (see below), whose sum is σ = 291716289648. Its totient is φ = 37038144000.

The previous prime is 111122223451. The next prime is 111122223533. The reversal of 111122223456 is 654322221111.

It is a tau number, because it is divible by the number of its divisors (48).

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122223451) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1740906 + ... + 1803606.

It is an arithmetic number, because the mean of its divisors is an integer number (6077422701).

Almost surely, 2^111122223456 is an apocalyptic number.

111122223456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

111122223456 is an abundant number, since it is smaller than the sum of its proper divisors (180594066192).

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

111122223456 is a wasteful number, since it uses less digits than its factorization.

111122223456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81175 (or 81167 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

Adding to 111122223456 its reverse (654322221111), we get a palindrome (765444444567).

The spelling of 111122223456 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty-three thousand, four hundred fifty-six".