1109201020 has 12 divisors (see below), whose sum is σ = 2329322184. Its totient is φ = 443680400.

The previous prime is 1109201011. The next prime is 1109201021. The reversal of 1109201020 is 201029011.

It is a junction number, because it is equal to n+sod(n) for n = 1109200985 and 1109201003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109201021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27730006 + ... + 27730045.

It is an arithmetic number, because the mean of its divisors is an integer number (194110182).

Almost surely, 2^1109201020 is an apocalyptic number.

1109201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1109201020 is an abundant number, since it is smaller than the sum of its proper divisors (1220121164).

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

1109201020 is a wasteful number, since it uses less digits than its factorization.

1109201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55460060 (or 55460058 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1109201020 is about 33304.6696425591. The cubic root of 1109201020 is about 1035.1503185098.

The spelling of 1109201020 in words is "one billion, one hundred nine million, two hundred one thousand, twenty".