212105305434 has 32 divisors (see below), whose sum is σ = 462796853760. Its totient is φ = 64271329200.

The previous prime is 212105305427. The next prime is 212105305463. The reversal of 212105305434 is 434503501212.

212105305434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 1641819 + ... + 1766289.

It is an arithmetic number, because the mean of its divisors is an integer number (14462401680).

Almost surely, 2^212105305434 is an apocalyptic number.

212105305434 is an abundant number, since it is smaller than the sum of its proper divisors (250691548326).

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

212105305434 is a wasteful number, since it uses less digits than its factorization.

212105305434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150306.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 212105305434 its reverse (434503501212), we get a palindrome (646608806646).

The spelling of 212105305434 in words is "two hundred twelve billion, one hundred five million, three hundred five thousand, four hundred thirty-four".