212204123430 has 128 divisors (see below), whose sum is σ = 553263782400. Its totient is φ = 51779119104.

The previous prime is 212204123399. The next prime is 212204123447. The reversal of 212204123430 is 34321402212.

It is a happy number.

212204123430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 212204123430.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 40058542 + ... + 40063838.

It is an arithmetic number, because the mean of its divisors is an integer number (4322373300).

Almost surely, 2^212204123430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212204123430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276631891200).

212204123430 is an abundant number, since it is smaller than the sum of its proper divisors (341059658970).

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

212204123430 is a wasteful number, since it uses less digits than its factorization.

212204123430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6198.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 212204123430 its reverse (34321402212), we get a palindrome (246525525642).

The spelling of 212204123430 in words is "two hundred twelve billion, two hundred four million, one hundred twenty-three thousand, four hundred thirty".