1000020100100 has 72 divisors (see below), whose sum is σ = 2507915733120. Its totient is φ = 339011608320.

The previous prime is 1000020100099. The next prime is 1000020100171. The reversal of 1000020100100 is 10010200001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7963544 + ... + 8088143.

It is an arithmetic number, because the mean of its divisors is an integer number (34832162960).

Almost surely, 2^{1000020100100} is an apocalyptic number.

1000020100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000020100100 is an abundant number, since it is smaller than the sum of its proper divisors (1507895633020).

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

1000020100100 is a wasteful number, since it uses less digits than its factorization.

1000020100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16051797 (or 16051790 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 1000020100100 its reverse (10010200001), we get a palindrome (1010030300101).

Subtracting from 1000020100100 its reverse (10010200001), we obtain a palindrome (990009900099).

The spelling of 1000020100100 in words is "one trillion, twenty million, one hundred thousand, one hundred".