212102211202020 has 144 divisors (see below), whose sum is σ = 645367813009920. Its totient is φ = 56385644606208.

The previous prime is 212102211201971. The next prime is 212102211202129. The reversal of 212102211202020 is 20202112201212.

It is a happy number.

212102211202020 is a `hidden beast` number, since 2 + 121 + 0 + 221 + 120 + 202 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212102211201984 and 212102211202002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209704357 + ... + 210713363.

It is an arithmetic number, because the mean of its divisors is an integer number (4481720923680).

Almost surely, 2^{212102211202020} is an apocalyptic number.

212102211202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212102211202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322683906504960).

212102211202020 is an abundant number, since it is smaller than the sum of its proper divisors (433265601807900).

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

212102211202020 is a wasteful number, since it uses less digits than its factorization.

212102211202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012634 (or 1012629 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212102211202020 its reverse (20202112201212), we get a palindrome (232304323403232).

The spelling of 212102211202020 in words is "two hundred twelve trillion, one hundred two billion, two hundred eleven million, two hundred two thousand, twenty".