111111222000 has 160 divisors (see below), whose sum is σ = 367905006144. Its totient is φ = 28828800000.

The previous prime is 111111221971. The next prime is 111111222011. The reversal of 111111222000 is 222111111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 28251 + ... + 472250.

Almost surely, 2^111111222000 is an apocalyptic number.

111111222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111111222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183952503072).

111111222000 is an abundant number, since it is smaller than the sum of its proper divisors (256793784144).

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

111111222000 is a wasteful number, since it uses less digits than its factorization.

111111222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500564 (or 500548 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111111222000 its reverse (222111111), we get a palindrome (111333333111).

It can be divided in two parts, 111 and 111222000, that added together give a palindrome (111222111).

The spelling of 111111222000 in words is "one hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand".