210021200010020 has 36 divisors (see below), whose sum is σ = 513051788598300. Its totient is φ = 72007268574528.

The previous prime is 210021200009953. The next prime is 210021200010047. The reversal of 210021200010020 is 20010002120012.

It is a happy number.

210021200010020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42047365547236 + 167973834462784 = 6484394^2 + 12960472^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210021200009983 and 210021200010010.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107153672495 + ... + 107153674454.

It is an arithmetic number, because the mean of its divisors is an integer number (14251438572175).

Almost surely, 2^{210021200010020} is an apocalyptic number.

210021200010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210021200010020 is an abundant number, since it is smaller than the sum of its proper divisors (303030588588280).

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

210021200010020 is a wasteful number, since it uses less digits than its factorization.

210021200010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214307346972 (or 214307346963 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210021200010020 its reverse (20010002120012), we get a palindrome (230031202130032).

The spelling of 210021200010020 in words is "two hundred ten trillion, twenty-one billion, two hundred million, ten thousand, twenty".