11111122020 has 48 divisors (see below), whose sum is σ = 31485988800. Its totient is φ = 2927266176.

The previous prime is 11111122007. The next prime is 11111122039. The reversal of 11111122020 is 2022111111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11111121987 and 11111122005.

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 15 ways as a sum of consecutive naturals, for example, 1110595 + ... + 1120554.

It is an arithmetic number, because the mean of its divisors is an integer number (655958100).

Almost surely, 2^11111122020 is an apocalyptic number.

11111122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111122020 is an abundant number, since it is smaller than the sum of its proper divisors (20374866780).

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

11111122020 is a wasteful number, since it uses less digits than its factorization.

11111122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231244 (or 2231242 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11111122020 its reverse (2022111111), we get a palindrome (13133233131).

The spelling of 11111122020 in words is "eleven billion, one hundred eleven million, one hundred twenty-two thousand, twenty".