4221140421 has 16 divisors (see below), whose sum is σ = 5672563200. Its totient is φ = 2791966320.

The previous prime is 4221140419. The next prime is 4221140423. The reversal of 4221140421 is 1240411224.

It is an interprime number because it is at equal distance from previous prime (4221140419) and next prime (4221140423).

It is not a de Polignac number, because 4221140421 - 2¹ = 4221140419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221140423) 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, 285706 + ... + 300116.

It is an arithmetic number, because the mean of its divisors is an integer number (354535200).

Almost surely, 2^4221140421 is an apocalyptic number.

It is an amenable number.

4221140421 is a deficient number, since it is larger than the sum of its proper divisors (1451422779).

4221140421 is a wasteful number, since it uses less digits than its factorization.

4221140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15176.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 4221140421 is about 64970.3041473564. The cubic root of 4221140421 is about 1616.1311454372.

Adding to 4221140421 its reverse (1240411224), we get a palindrome (5461551645).

The spelling of 4221140421 in words is "four billion, two hundred twenty-one million, one hundred forty thousand, four hundred twenty-one".