4320212021 has 4 divisors (see below), whose sum is σ = 4420682112. Its totient is φ = 4219741932.

The previous prime is 4320211999. The next prime is 4320212069. The reversal of 4320212021 is 1202120234.

4320212021 is digitally balanced in base 3, 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 4320212021 - 2³⁰ = 3246470197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4320212321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50234981 + ... + 50235066.

It is an arithmetic number, because the mean of its divisors is an integer number (1105170528).

Almost surely, 2^4320212021 is an apocalyptic number.

It is an amenable number.

4320212021 is a deficient number, since it is larger than the sum of its proper divisors (100470091).

4320212021 is a wasteful number, since it uses less digits than its factorization.

4320212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100470090.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4320212021 is about 65728.3197792245. The cubic root of 4320212021 is about 1628.6772136663.

Adding to 4320212021 its reverse (1202120234), we get a palindrome (5522332255).

The spelling of 4320212021 in words is "four billion, three hundred twenty million, two hundred twelve thousand, twenty-one".