212224044421 has 4 divisors (see below), whose sum is σ = 212225534752. Its totient is φ = 212222554092.

The previous prime is 212224044343. The next prime is 212224044449. The reversal of 212224044421 is 124440422212.

It is a happy number.

212224044421 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 212224044421 - 2⁷ = 212224044293 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 212224044421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212224044451) 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, 505971 + ... + 824896.

It is an arithmetic number, because the mean of its divisors is an integer number (53056383688).

Almost surely, 2^212224044421 is an apocalyptic number.

It is an amenable number.

212224044421 is a deficient number, since it is larger than the sum of its proper divisors (1490331).

212224044421 is a wasteful number, since it uses less digits than its factorization.

212224044421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490330.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 212224044421 its reverse (124440422212), we get a palindrome (336664466633).

The spelling of 212224044421 in words is "two hundred twelve billion, two hundred twenty-four million, forty-four thousand, four hundred twenty-one".