1100021112 has 96 divisors (see below), whose sum is σ = 3237312000. Its totient is φ = 336156480.

The previous prime is 1100021107. The next prime is 1100021129. The reversal of 1100021112 is 2111200011.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1100021094 and 1100021103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29439 + ... + 55377.

It is an arithmetic number, because the mean of its divisors is an integer number (33722000).

Almost surely, 2^1100021112 is an apocalyptic number.

1100021112 is a gapful number since it is divisible by the number (12) 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 1100021112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1618656000).

1100021112 is an abundant number, since it is smaller than the sum of its proper divisors (2137290888).

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

1100021112 is a wasteful number, since it uses less digits than its factorization.

1100021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26001 (or 25994 counting only the distinct ones).

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

The square root of 1100021112 is about 33166.5661774022. The cubic root of 1100021112 is about 1032.2867195044.

Adding to 1100021112 its reverse (2111200011), we get a palindrome (3211221123).

The spelling of 1100021112 in words is "one billion, one hundred million, twenty-one thousand, one hundred twelve".