212201224420 has 48 divisors (see below), whose sum is σ = 456876162288. Its totient is φ = 82740439040.

The previous prime is 212201224409. The next prime is 212201224421. The reversal of 212201224420 is 24422102212.

It can be written as a sum of positive squares in 8 ways, for example, as 21611352064 + 190589872356 = 147008^2 + 436566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212201224391 and 212201224400.

It is not an unprimeable number, because it can be changed into a prime (212201224421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869802 + ... + 1086718.

It is an arithmetic number, because the mean of its divisors is an integer number (9518253381).

Almost surely, 2^212201224420 is an apocalyptic number.

212201224420 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 212201224420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228438081144).

212201224420 is an abundant number, since it is smaller than the sum of its proper divisors (244674937868).

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

212201224420 is a wasteful number, since it uses less digits than its factorization.

212201224420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218160 (or 218158 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 212201224420 its reverse (24422102212), we get a palindrome (236623326632).

The spelling of 212201224420 in words is "two hundred twelve billion, two hundred one million, two hundred twenty-four thousand, four hundred twenty".