1112021120 has 128 divisors (see below), whose sum is σ = 3050697600. Its totient is φ = 379699200.

The previous prime is 1112021111. The next prime is 1112021123. The reversal of 1112021120 is 211202111.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (1112021123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1796171 + ... + 1796789.

It is an arithmetic number, because the mean of its divisors is an integer number (23833575).

Almost surely, 2^1112021120 is an apocalyptic number.

1112021120 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 1112021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1525348800).

1112021120 is an abundant number, since it is smaller than the sum of its proper divisors (1938676480).

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

1112021120 is an equidigital number, since it uses as much as digits as its factorization.

1112021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1112021120 is about 33346.9806729185. The cubic root of 1112021120 is about 1036.0268524119.

Adding to 1112021120 its reverse (211202111), we get a palindrome (1323223231).

The spelling of 1112021120 in words is "one billion, one hundred twelve million, twenty-one thousand, one hundred twenty".