100121122020 has 48 divisors (see below), whose sum is σ = 280511719488. Its totient is φ = 26682529920.

The previous prime is 100121122019. The next prime is 100121122091. The reversal of 100121122020 is 20221121001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100121121987 and 100121122005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415191 + ... + 610430.

It is an arithmetic number, because the mean of its divisors is an integer number (5843994156).

Almost surely, 2^100121122020 is an apocalyptic number.

100121122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121122020 is an abundant number, since it is smaller than the sum of its proper divisors (180390597468).

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

100121122020 is a wasteful number, since it uses less digits than its factorization.

100121122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027260 (or 1027258 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100121122020 its reverse (20221121001), we get a palindrome (120342243021).

The spelling of 100121122020 in words is "one hundred billion, one hundred twenty-one million, one hundred twenty-two thousand, twenty".