212211201020220 has 336 divisors, whose sum is σ = 671131456087680. Its totient is φ = 56338081486848.

The previous prime is 212211201020201. The next prime is 212211201020243. The reversal of 212211201020220 is 22020102112212.

It is a happy number.

212211201020220 is a `hidden beast` number, since 2 + 1 + 221 + 1 + 201 + 0 + 20 + 220 = 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 = 212211201020193 and 212211201020202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 21803262474 + ... + 21803272206.

It is an arithmetic number, because the mean of its divisors is an integer number (1997415047880).

Almost surely, 2^{212211201020220} is an apocalyptic number.

212211201020220 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 212211201020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335565728043840).

212211201020220 is an abundant number, since it is smaller than the sum of its proper divisors (458920255067460).

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

212211201020220 is a wasteful number, since it uses less digits than its factorization.

212211201020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16256 (or 16239 counting only the distinct ones).

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

Adding to 212211201020220 its reverse (22020102112212), we get a palindrome (234231303132432).

The spelling of 212211201020220 in words is "two hundred twelve trillion, two hundred eleven billion, two hundred one million, twenty thousand, two hundred twenty".