4221001212 has 12 divisors (see below), whose sum is σ = 9849002856. Its totient is φ = 1407000400.

The previous prime is 4221001207. The next prime is 4221001229. The reversal of 4221001212 is 2121001224.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 4221001191 and 4221001200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175875039 + ... + 175875062.

It is an arithmetic number, because the mean of its divisors is an integer number (820750238).

Almost surely, 2^4221001212 is an apocalyptic number.

It is an amenable number.

4221001212 is an abundant number, since it is smaller than the sum of its proper divisors (5628001644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221001212 is a wasteful number, since it uses less digits than its factorization.

4221001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351750108 (or 351750106 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 4221001212 is about 64969.2328106158. The cubic root of 4221001212 is about 1616.1133791109.

Adding to 4221001212 its reverse (2121001224), we get a palindrome (6342002436).

The spelling of 4221001212 in words is "four billion, two hundred twenty-one million, one thousand, two hundred twelve".