11111100002020 has 24 divisors (see below), whose sum is σ = 24137906902200. Its totient is φ = 4291183448832.

The previous prime is 11111100001999. The next prime is 11111100002059. The reversal of 11111100002020 is 2020000111111.

It can be written as a sum of positive squares in 4 ways, for example, as 98843587236 + 11012256414784 = 314394^2 + 3318472^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11111100001988 and 11111100002006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9578533905 + ... + 9578535064.

It is an arithmetic number, because the mean of its divisors is an integer number (1005746120925).

Almost surely, 2^{11111100002020} is an apocalyptic number.

11111100002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111100002020 is an abundant number, since it is smaller than the sum of its proper divisors (13026806900180).

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

11111100002020 is a wasteful number, since it uses less digits than its factorization.

11111100002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19157069007 (or 19157069005 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11111100002020 its reverse (2020000111111), we get a palindrome (13131100113131).

The spelling of 11111100002020 in words is "eleven trillion, one hundred eleven billion, one hundred million, two thousand, twenty".