100121002020 has 96 divisors (see below), whose sum is σ = 335448167040. Its totient is φ = 24645168000.

The previous prime is 100121002001. The next prime is 100121002043. The reversal of 100121002020 is 20200121001.

100121002020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 = 100121001993 and 100121002011.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 7124106 + ... + 7138145.

It is an arithmetic number, because the mean of its divisors is an integer number (3494251740).

Almost surely, 2^100121002020 is an apocalyptic number.

100121002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121002020 is an abundant number, since it is smaller than the sum of its proper divisors (235327165020).

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

100121002020 is a wasteful number, since it uses less digits than its factorization.

100121002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14262282 (or 14262274 counting only the distinct ones).

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

Adding to 100121002020 its reverse (20200121001), we get a palindrome (120321123021).

The spelling of 100121002020 in words is "one hundred billion, one hundred twenty-one million, two thousand, twenty".