212011020020 has 12 divisors (see below), whose sum is σ = 445223142084. Its totient is φ = 84804408000.

The previous prime is 212011019989. The next prime is 212011020029. The reversal of 212011020020 is 20020110212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 48785323876 + 163225696144 = 220874^2 + 404012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212011019983 and 212011020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011020029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5300275481 + ... + 5300275520.

It is an arithmetic number, because the mean of its divisors is an integer number (37101928507).

Almost surely, 2^212011020020 is an apocalyptic number.

212011020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212011020020 is an abundant number, since it is smaller than the sum of its proper divisors (233212122064).

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

212011020020 is a wasteful number, since it uses less digits than its factorization.

212011020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600551010 (or 10600551008 counting only the distinct ones).

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

Adding to 212011020020 its reverse (20020110212), we get a palindrome (232031130232).

The spelling of 212011020020 in words is "two hundred twelve billion, eleven million, twenty thousand, twenty".