1101001820 has 24 divisors (see below), whose sum is σ = 2391832800. Its totient is φ = 425214272.

The previous prime is 1101001819. The next prime is 1101001829. The reversal of 1101001820 is 281001011.

It is a junction number, because it is equal to n+sod(n) for n = 1101001795 and 1101001804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101001829) 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, 948560 + ... + 949719.

It is an arithmetic number, because the mean of its divisors is an integer number (99659700).

Almost surely, 2^1101001820 is an apocalyptic number.

1101001820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101001820 is an abundant number, since it is smaller than the sum of its proper divisors (1290830980).

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

1101001820 is a wasteful number, since it uses less digits than its factorization.

1101001820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898317 (or 1898315 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1101001820 is about 33181.3474711320. The cubic root of 1101001820 is about 1032.5934018419.

Adding to 1101001820 its reverse (281001011), we get a palindrome (1382002831).

The spelling of 1101001820 in words is "one billion, one hundred one million, one thousand, eight hundred twenty".