11100001020 has 96 divisors (see below), whose sum is σ = 34138298880. Its totient is φ = 2682282240.

The previous prime is 11100000983. The next prime is 11100001027. The reversal of 11100001020 is 2010000111.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100001027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185451 + ... + 237890.

It is an arithmetic number, because the mean of its divisors is an integer number (355607280).

Almost surely, 2^11100001020 is an apocalyptic number.

11100001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11100001020 is an abundant number, since it is smaller than the sum of its proper divisors (23038297860).

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

11100001020 is a wasteful number, since it uses less digits than its factorization.

11100001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423395 (or 423393 counting only the distinct ones).

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

Adding to 11100001020 its reverse (2010000111), we get a palindrome (13110001131).

Subtracting from 11100001020 its reverse (2010000111), we obtain a palindrome (9090000909).

The spelling of 11100001020 in words is "eleven billion, one hundred million, one thousand, twenty".