4221012 has 12 divisors (see below), whose sum is σ = 9849056. Its totient is φ = 1407000.

The previous prime is 4221011. The next prime is 4221031. The reversal of 4221012 is 2101224.

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

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 351751 = 4221012 / (4 + 2 + 2 + 1 + 0 + 1 + 2).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175864 + ... + 175887.

Almost surely, 2^4221012 is an apocalyptic number.

It is an amenable number.

4221012 is an abundant number, since it is smaller than the sum of its proper divisors (5628044).

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

4221012 is a wasteful number, since it uses less digits than its factorization.

4221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351758 (or 351756 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 4221012 is about 2054.5101605979. The cubic root of 4221012 is about 161.6114755926.

Adding to 4221012 its reverse (2101224), we get a palindrome (6322236).

The spelling of 4221012 in words is "four million, two hundred twenty-one thousand, twelve".