1001020021110 has 144 divisors (see below), whose sum is σ = 2645533393776. Its totient is φ = 262610764416.

The previous prime is 1001020021103. The next prime is 1001020021163. The reversal of 1001020021110 is 111200201001.

It is a happy number.

1001020021110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 1001020021092 and 1001020021101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 499759369 + ... + 499761371.

It is an arithmetic number, because the mean of its divisors is an integer number (18371759679).

Almost surely, 2^{1001020021110} is an apocalyptic number.

1001020021110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001020021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322766696888).

1001020021110 is an abundant number, since it is smaller than the sum of its proper divisors (1644513372666).

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

1001020021110 is a wasteful number, since it uses less digits than its factorization.

1001020021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387 (or 3317 counting only the distinct ones).

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

Adding to 1001020021110 its reverse (111200201001), we get a palindrome (1112220222111).

The spelling of 1001020021110 in words is "one trillion, one billion, twenty million, twenty-one thousand, one hundred ten".