11111100111020 has 192 divisors, whose sum is σ = 28852844267520. Its totient is φ = 3499971213312.

The previous prime is 11111100110993. The next prime is 11111100111113. The reversal of 11111100111020 is 2011100111111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11111100110992 and 11111100111010.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1663584041 + ... + 1663590719.

It is an arithmetic number, because the mean of its divisors is an integer number (150275230560).

Almost surely, 2^{11111100111020} is an apocalyptic number.

11111100111020 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 11111100111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14426422133760).

11111100111020 is an abundant number, since it is smaller than the sum of its proper divisors (17741744156500).

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

11111100111020 is a wasteful number, since it uses less digits than its factorization.

11111100111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10864 (or 10862 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 11111100111020 its reverse (2011100111111), we get a palindrome (13122200222131).

Subtracting from 11111100111020 its reverse (2011100111111), we obtain a palindrome (9099999999909).

The spelling of 11111100111020 in words is "eleven trillion, one hundred eleven billion, one hundred million, one hundred eleven thousand, twenty".