212020221220 has 12 divisors (see below), whose sum is σ = 445242464604. Its totient is φ = 84808088480.

The previous prime is 212020221173. The next prime is 212020221227. The reversal of 212020221220 is 22122020212.

212020221220 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 93459826944 + 118560394276 = 305712^2 + 344326^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212020221194 and 212020221203.

It is not an unprimeable number, because it can be changed into a prime (212020221227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5300505511 + ... + 5300505550.

It is an arithmetic number, because the mean of its divisors is an integer number (37103538717).

Almost surely, 2^212020221220 is an apocalyptic number.

212020221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212020221220 is an abundant number, since it is smaller than the sum of its proper divisors (233222243384).

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

212020221220 is a wasteful number, since it uses less digits than its factorization.

212020221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601011070 (or 10601011068 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 212020221220 its reverse (22122020212), we get a palindrome (234142241432).

The spelling of 212020221220 in words is "two hundred twelve billion, twenty million, two hundred twenty-one thousand, two hundred twenty".