1111022020 has 48 divisors (see below), whose sum is σ = 2412942336. Its totient is φ = 429264000.

The previous prime is 1111022009. The next prime is 1111022021. The reversal of 1111022020 is 202201111.

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 = 1111021988 and 1111022006.

It is not an unprimeable number, because it can be changed into a prime (1111022021) by changing a digit.

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, 408465 + ... + 411175.

It is an arithmetic number, because the mean of its divisors is an integer number (50269632).

Almost surely, 2^1111022020 is an apocalyptic number.

1111022020 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 1111022020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1206471168).

1111022020 is an abundant number, since it is smaller than the sum of its proper divisors (1301920316).

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

1111022020 is a wasteful number, since it uses less digits than its factorization.

1111022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412 (or 3410 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1111022020 is about 33331.9969398775. The cubic root of 1111022020 is about 1035.7164852317.

Adding to 1111022020 its reverse (202201111), we get a palindrome (1313223131).

The spelling of 1111022020 in words is "one billion, one hundred eleven million, twenty-two thousand, twenty".