212012134021 has 4 divisors (see below), whose sum is σ = 214695832000. Its totient is φ = 209328436044.

The previous prime is 212012133997. The next prime is 212012134027. The reversal of 212012134021 is 120431210212.

212012134021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212012134021 - 2¹¹ = 212012131973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212012134021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012134027) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1341848871 + ... + 1341849028.

It is an arithmetic number, because the mean of its divisors is an integer number (53673958000).

Almost surely, 2^212012134021 is an apocalyptic number.

It is an amenable number.

212012134021 is a deficient number, since it is larger than the sum of its proper divisors (2683697979).

212012134021 is an equidigital number, since it uses as much as digits as its factorization.

212012134021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683697978.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212012134021 its reverse (120431210212), we get a palindrome (332443344233).

The spelling of 212012134021 in words is "two hundred twelve billion, twelve million, one hundred thirty-four thousand, twenty-one".