11111110020 has 144 divisors (see below), whose sum is σ = 35212125312. Its totient is φ = 2830671360.

The previous prime is 11111110013. The next prime is 11111110033. The reversal of 11111110020 is 2001111111.

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 = 11111109984 and 11111110011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6337464 + ... + 6339216.

It is an arithmetic number, because the mean of its divisors is an integer number (244528648).

Almost surely, 2^11111110020 is an apocalyptic number.

11111110020 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 11111110020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17606062656).

11111110020 is an abundant number, since it is smaller than the sum of its proper divisors (24101015292).

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

11111110020 is a wasteful number, since it uses less digits than its factorization.

11111110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322 (or 3317 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11111110020 its reverse (2001111111), we get a palindrome (13112221131).

The spelling of 11111110020 in words is "eleven billion, one hundred eleven million, one hundred ten thousand, twenty".