11100100020 has 96 divisors (see below), whose sum is σ = 33210777600. Its totient is φ = 2760321024.

The previous prime is 11100100009. The next prime is 11100100031. The reversal of 11100100020 is 2000100111.

11100100020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11100100009) and next prime (11100100031).

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 junction number, because it is equal to n+sod(n) for n = 11100099981 and 11100100008.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61261 + ... + 161099.

It is an arithmetic number, because the mean of its divisors is an integer number (345945600).

Almost surely, 2^11100100020 is an apocalyptic number.

11100100020 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 11100100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16605388800).

11100100020 is an abundant number, since it is smaller than the sum of its proper divisors (22110677580).

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

11100100020 is a wasteful number, since it uses less digits than its factorization.

11100100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99977 (or 99975 counting only the distinct ones).

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

Adding to 11100100020 its reverse (2000100111), we get a palindrome (13100200131).

Subtracting from 11100100020 its reverse (2000100111), we obtain a palindrome (9099999909).

The spelling of 11100100020 in words is "eleven billion, one hundred million, one hundred thousand, twenty".