212021220012220 has 96 divisors (see below), whose sum is σ = 452664082160640. Its totient is φ = 83402108213760.

The previous prime is 212021220012209. The next prime is 212021220012223. The reversal of 212021220012220 is 22210022120212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021220012223) 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 31 ways as a sum of consecutive naturals, for example, 4425290065 + ... + 4425337975.

It is an arithmetic number, because the mean of its divisors is an integer number (4715250855840).

Almost surely, 2^{212021220012220} is an apocalyptic number.

212021220012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021220012220 is an abundant number, since it is smaller than the sum of its proper divisors (240642862148420).

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

212021220012220 is a wasteful number, since it uses less digits than its factorization.

212021220012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56795 (or 56793 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 212021220012220 its reverse (22210022120212), we get a palindrome (234231242132432).

The spelling of 212021220012220 in words is "two hundred twelve trillion, twenty-one billion, two hundred twenty million, twelve thousand, two hundred twenty".