4021212 has 48 divisors (see below), whose sum is σ = 10231200. Its totient is φ = 1221888.

The previous prime is 4021211. The next prime is 4021229. The reversal of 4021212 is 2121204.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23158 + ... + 23330.

It is an arithmetic number, because the mean of its divisors is an integer number (213150).

Almost surely, 2^4021212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4021212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5115600).

4021212 is an abundant number, since it is smaller than the sum of its proper divisors (6209988).

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

4021212 is a wasteful number, since it uses less digits than its factorization.

4021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 340 counting only the distinct ones).

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

The square root of 4021212 is about 2005.2959881274. The cubic root of 4021212 is about 159.0202102390.

Adding to 4021212 its reverse (2121204), we get a palindrome (6142416).

The spelling of 4021212 in words is "four million, twenty-one thousand, two hundred twelve".