4221046221 has 16 divisors (see below), whose sum is σ = 6478348800. Its totient is φ = 2394672048.

The previous prime is 4221046217. The next prime is 4221046231. The reversal of 4221046221 is 1226401224.

It is a happy number.

4221046221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4221046221 - 2² = 4221046217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4221046191 and 4221046200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221046231) 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, 720111 + ... + 725948.

It is an arithmetic number, because the mean of its divisors is an integer number (404896800).

Almost surely, 2^4221046221 is an apocalyptic number.

It is an amenable number.

4221046221 is a deficient number, since it is larger than the sum of its proper divisors (2257302579).

4221046221 is a wasteful number, since it uses less digits than its factorization.

4221046221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446208.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 4221046221 is about 64969.5791967287. The cubic root of 4221046221 is about 1616.1191233554.

Adding to 4221046221 its reverse (1226401224), we get a palindrome (5447447445).

The spelling of 4221046221 in words is "four billion, two hundred twenty-one million, forty-six thousand, two hundred twenty-one".