4012221 has 16 divisors (see below), whose sum is σ = 5712768. Its totient is φ = 2496000.

The previous prime is 4012213. The next prime is 4012241. The reversal of 4012221 is 1222104.

It is not a de Polignac number, because 4012221 - 2³ = 4012213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4012197 and 4012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4012241) 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, 7441 + ... + 7961.

It is an arithmetic number, because the mean of its divisors is an integer number (357048).

Almost surely, 2^4012221 is an apocalyptic number.

It is an amenable number.

4012221 is a deficient number, since it is larger than the sum of its proper divisors (1700547).

4012221 is a wasteful number, since it uses less digits than its factorization.

4012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692.

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

The square root of 4012221 is about 2003.0529199200. The cubic root of 4012221 is about 158.9016044036.

Adding to 4012221 its reverse (1222104), we get a palindrome (5234325).

The spelling of 4012221 in words is "four million, twelve thousand, two hundred twenty-one".