212434343220 has 192 divisors, whose sum is σ = 677213187840. Its totient is φ = 49282867200.

The previous prime is 212434343189. The next prime is 212434343243. The reversal of 212434343220 is 22343434212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2113710 + ... + 2211930.

It is an arithmetic number, because the mean of its divisors is an integer number (3527152020).

Almost surely, 2^212434343220 is an apocalyptic number.

212434343220 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 212434343220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338606593920).

212434343220 is an abundant number, since it is smaller than the sum of its proper divisors (464778844620).

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

212434343220 is a wasteful number, since it uses less digits than its factorization.

212434343220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98386 (or 98384 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 212434343220 its reverse (22343434212), we get a palindrome (234777777432).

The spelling of 212434343220 in words is "two hundred twelve billion, four hundred thirty-four million, three hundred forty-three thousand, two hundred twenty".