1112021100 has 108 divisors (see below), whose sum is σ = 3504359040. Its totient is φ = 294940800.

The previous prime is 1112021093. The next prime is 1112021111. The reversal of 1112021100 is 11202111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 168666 + ... + 175134.

Almost surely, 2^1112021100 is an apocalyptic number.

1112021100 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 1112021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752179520).

1112021100 is an abundant number, since it is smaller than the sum of its proper divisors (2392337940).

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

1112021100 is a wasteful number, since it uses less digits than its factorization.

1112021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6680 (or 6670 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1112021100 is about 33346.9803730413. The cubic root of 1112021100 is about 1036.0268462009.

Adding to 1112021100 its reverse (11202111), we get a palindrome (1123223211).

The spelling of 1112021100 in words is "one billion, one hundred twelve million, twenty-one thousand, one hundred".