212121010202020 has 48 divisors (see below), whose sum is σ = 450898987492800. Its totient is φ = 83815990220160.

The previous prime is 212121010201999. The next prime is 212121010202039. The reversal of 212121010202020 is 20202010121212.

It is a happy number.

It is a super-3 number, since 3×212121010202020³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212121010201985 and 212121010202003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146262130 + ... + 147705289.

It is an arithmetic number, because the mean of its divisors is an integer number (9393728906100).

Almost surely, 2^{212121010202020} is an apocalyptic number.

212121010202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121010202020 is an abundant number, since it is smaller than the sum of its proper divisors (238777977290780).

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

212121010202020 is a wasteful number, since it uses less digits than its factorization.

212121010202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293967868 (or 293967866 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212121010202020 its reverse (20202010121212), we get a palindrome (232323020323232).

The spelling of 212121010202020 in words is "two hundred twelve trillion, one hundred twenty-one billion, ten million, two hundred two thousand, twenty".