212012120221 has 8 divisors (see below), whose sum is σ = 231579841824. Its totient is φ = 192493380720.

The previous prime is 212012120209. The next prime is 212012120227. The reversal of 212012120221 is 122021210212.

It is a happy number.

212012120221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212012120221 - 2²⁹ = 211475249309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212012120195 and 212012120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012120227) 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 7 ways as a sum of consecutive naturals, for example, 12236470 + ... + 12253783.

It is an arithmetic number, because the mean of its divisors is an integer number (28947480228).

Almost surely, 2^212012120221 is an apocalyptic number.

It is an amenable number.

212012120221 is a deficient number, since it is larger than the sum of its proper divisors (19567721603).

212012120221 is a wasteful number, since it uses less digits than its factorization.

212012120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24491051.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212012120221 its reverse (122021210212), we get a palindrome (334033330433).

It can be divided in two parts, 212012 and 120221, that added together give a palindrome (332233).

The spelling of 212012120221 in words is "two hundred twelve billion, twelve million, one hundred twenty thousand, two hundred twenty-one".