210102200021021 has 48 divisors (see below), whose sum is σ = 282616815750912. Its totient is φ = 153916501939200.

The previous prime is 210102200021017. The next prime is 210102200021039. The reversal of 210102200021021 is 120120002201012.

It is not a de Polignac number, because 210102200021021 - 2² = 210102200021017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210102200020987 and 210102200021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210102200021011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4237256 + ... + 20932241.

It is an arithmetic number, because the mean of its divisors is an integer number (5887850328144).

Almost surely, 2^{210102200021021} is an apocalyptic number.

It is an amenable number.

210102200021021 is a deficient number, since it is larger than the sum of its proper divisors (72514615729891).

210102200021021 is a wasteful number, since it uses less digits than its factorization.

210102200021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25170450 (or 25170443 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210102200021021 its reverse (120120002201012), we get a palindrome (330222202222033).

The spelling of 210102200021021 in words is "two hundred ten trillion, one hundred two billion, two hundred million, twenty-one thousand, twenty-one".