212004424021 has 16 divisors (see below), whose sum is σ = 232083670000. Its totient is φ = 192464709120.

The previous prime is 212004423979. The next prime is 212004424091. The reversal of 212004424021 is 120424400212.

212004424021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 8107021521 + 203897402500 = 90039^2 + 451550^2 .

It is a cyclic number.

It is not a de Polignac number, because 212004424021 - 2¹⁷ = 212004292949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212004423983 and 212004424001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212004424091) 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 15 ways as a sum of consecutive naturals, for example, 12877231 + ... + 12893683.

It is an arithmetic number, because the mean of its divisors is an integer number (14505229375).

Almost surely, 2^212004424021 is an apocalyptic number.

It is an amenable number.

212004424021 is a deficient number, since it is larger than the sum of its proper divisors (20079245979).

212004424021 is a wasteful number, since it uses less digits than its factorization.

212004424021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32776.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 212004424021 its reverse (120424400212), we get a palindrome (332428824233).

The spelling of 212004424021 in words is "two hundred twelve billion, four million, four hundred twenty-four thousand, twenty-one".