212012212134 has 32 divisors (see below), whose sum is σ = 426884705280. Its totient is φ = 70194550752.

The previous prime is 212012212133. The next prime is 212012212151. The reversal of 212012212134 is 431212210212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212012212134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012212133) 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, 1567339 + ... + 1697225.

It is an arithmetic number, because the mean of its divisors is an integer number (13340147040).

Almost surely, 2^212012212134 is an apocalyptic number.

212012212134 is an abundant number, since it is smaller than the sum of its proper divisors (214872493146).

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

212012212134 is a wasteful number, since it uses less digits than its factorization.

212012212134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131724.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 212012212134 its reverse (431212210212), we get a palindrome (643224422346).

The spelling of 212012212134 in words is "two hundred twelve billion, twelve million, two hundred twelve thousand, one hundred thirty-four".