2100213122020 has 72 divisors (see below), whose sum is σ = 4800815792640. Its totient is φ = 771403052160.

The previous prime is 2100213122009. The next prime is 2100213122197. The reversal of 2100213122020 is 202213120012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2100213121985 and 2100213122003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 981030 + ... + 2272189.

It is an arithmetic number, because the mean of its divisors is an integer number (66677997120).

Almost surely, 2^{2100213122020} is an apocalyptic number.

2100213122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100213122020 is an abundant number, since it is smaller than the sum of its proper divisors (2700602670620).

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

2100213122020 is a wasteful number, since it uses less digits than its factorization.

2100213122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3253445 (or 3253430 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2100213122020 its reverse (202213120012), we get a palindrome (2302426242032).

The spelling of 2100213122020 in words is "two trillion, one hundred billion, two hundred thirteen million, one hundred twenty-two thousand, twenty".