212105334 has 64 divisors (see below), whose sum is σ = 494553600. Its totient is φ = 59397888.

The previous prime is 212105323. The next prime is 212105347. The reversal of 212105334 is 433501212.

212105334 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212105334² = 89977345422503112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 212105334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 668944 + ... + 669260.

It is an arithmetic number, because the mean of its divisors is an integer number (7727400).

Almost surely, 2^212105334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212105334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247276800).

212105334 is an abundant number, since it is smaller than the sum of its proper divisors (282448266).

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

212105334 is a wasteful number, since it uses less digits than its factorization.

212105334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 212105334 is about 14563.8365137762. The cubic root of 212105334 is about 596.3719338899.

Adding to 212105334 its reverse (433501212), we get a palindrome (645606546).

The spelling of 212105334 in words is "two hundred twelve million, one hundred five thousand, three hundred thirty-four".