1110021000 has 128 divisors (see below), whose sum is σ = 3778220160. Its totient is φ = 269088000.

The previous prime is 1110020981. The next prime is 1110021019. The reversal of 1110021000 is 1200111.

It is an interprime number because it is at equal distance from previous prime (1110020981) and next prime (1110021019).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1110021000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16182 + ... + 49818.

It is an arithmetic number, because the mean of its divisors is an integer number (29517345).

Almost surely, 2^1110021000 is an apocalyptic number.

1110021000 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 1110021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889110080).

1110021000 is an abundant number, since it is smaller than the sum of its proper divisors (2668199160).

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

1110021000 is a wasteful number, since it uses less digits than its factorization.

1110021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33672 (or 33658 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1110021000 is about 33316.9776540430. The cubic root of 1110021000 is about 1035.4053349492.

Adding to 1110021000 its reverse (1200111), we get a palindrome (1111221111).

The spelling of 1110021000 in words is "one billion, one hundred ten million, twenty-one thousand".