201021210210020 has 12 divisors (see below), whose sum is σ = 422144541441084. Its totient is φ = 80408484084000.

The previous prime is 201021210210017. The next prime is 201021210210083. The reversal of 201021210210020 is 20012012120102.

It can be written as a sum of positive squares in 2 ways, for example, as 143031888644836 + 57989321565184 = 11959594^2 + 7615072^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201021210209977 and 201021210210004.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5025530255231 + ... + 5025530255270.

It is an arithmetic number, because the mean of its divisors is an integer number (35178711786757).

Almost surely, 2^{201021210210020} is an apocalyptic number.

201021210210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021210210020 is an abundant number, since it is smaller than the sum of its proper divisors (221123331231064).

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

201021210210020 is a wasteful number, since it uses less digits than its factorization.

201021210210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051060510510 (or 10051060510508 counting only the distinct ones).

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

Adding to 201021210210020 its reverse (20012012120102), we get a palindrome (221033222330122).

The spelling of 201021210210020 in words is "two hundred one trillion, twenty-one billion, two hundred ten million, two hundred ten thousand, twenty".