1222112000 has 144 divisors (see below), whose sum is σ = 3075762144. Its totient is φ = 483840000.

The previous prime is 1222111991. The next prime is 1222112057. The reversal of 1222112000 is 2112221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5791895 + ... + 5792105.

Almost surely, 2^1222112000 is an apocalyptic number.

1222112000 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 1222112000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1537881072).

1222112000 is an abundant number, since it is smaller than the sum of its proper divisors (1853650144).

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

1222112000 is an equidigital number, since it uses as much as digits as its factorization.

1222112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1222112000 is about 34958.7185119821. The cubic root of 1222112000 is about 1069.1459688904.

Adding to 1222112000 its reverse (2112221), we get a palindrome (1224224221).

The spelling of 1222112000 in words is "one billion, two hundred twenty-two million, one hundred twelve thousand".