1103021020 has 24 divisors (see below), whose sum is σ = 2319886800. Its totient is φ = 440533632.

The previous prime is 1103020999. The next prime is 1103021027. The reversal of 1103021020 is 201203011.

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 = 1103020988 and 1103021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103021027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28665 + ... + 55024.

It is an arithmetic number, because the mean of its divisors is an integer number (96661950).

Almost surely, 2^1103021020 is an apocalyptic number.

1103021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1103021020 is an abundant number, since it is smaller than the sum of its proper divisors (1216865780).

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

1103021020 is a wasteful number, since it uses less digits than its factorization.

1103021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84357 (or 84355 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1103021020 is about 33211.7602665080. The cubic root of 1103021020 is about 1033.2242634330.

Adding to 1103021020 its reverse (201203011), we get a palindrome (1304224031).

The spelling of 1103021020 in words is "one billion, one hundred three million, twenty-one thousand, twenty".