2101021320020 has 24 divisors (see below), whose sum is σ = 5042451168384. Its totient is φ = 720350166816.

The previous prime is 2101021320001. The next prime is 2101021320043. The reversal of 2101021320020 is 200231201012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 2101021319977 and 2101021320004.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 7503647432 + ... + 7503647711.

It is an arithmetic number, because the mean of its divisors is an integer number (210102132016).

Almost surely, 2^{2101021320020} is an apocalyptic number.

2101021320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101021320020 is an abundant number, since it is smaller than the sum of its proper divisors (2941429848364).

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

2101021320020 is a wasteful number, since it uses less digits than its factorization.

2101021320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15007295159 (or 15007295157 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 2101021320020 its reverse (200231201012), we get a palindrome (2301252521032).

The spelling of 2101021320020 in words is "two trillion, one hundred one billion, twenty-one million, three hundred twenty thousand, twenty".