100002011020020 has 72 divisors (see below), whose sum is σ = 303341106626376. Its totient is φ = 26667055844352.

The previous prime is 100002011019997. The next prime is 100002011020027. The reversal of 100002011020020 is 20020110200001.

It can be written as a sum of positive squares in 4 ways, for example, as 54501778731024 + 45500232288996 = 7382532^2 + 6745386^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100002011019984 and 100002011020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100002011020027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33396864 + ... + 36267816.

Almost surely, 2^{100002011020020} is an apocalyptic number.

100002011020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100002011020020 is an abundant number, since it is smaller than the sum of its proper divisors (203339095606356).

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

100002011020020 is a wasteful number, since it uses less digits than its factorization.

100002011020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064481 (or 3064476 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100002011020020 its reverse (20020110200001), we get a palindrome (120022121220021).

The spelling of 100002011020020 in words is "one hundred trillion, two billion, eleven million, twenty thousand, twenty".