4124420221 has 4 divisors (see below), whose sum is σ = 4125559744. Its totient is φ = 4123280700.

The previous prime is 4124420219. The next prime is 4124420243. The reversal of 4124420221 is 1220244214.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4124420221 - 2¹ = 4124420219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4124420192 and 4124420201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4124420021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564315 + ... + 571576.

It is an arithmetic number, because the mean of its divisors is an integer number (1031389936).

Almost surely, 2^4124420221 is an apocalyptic number.

It is an amenable number.

4124420221 is a deficient number, since it is larger than the sum of its proper divisors (1139523).

4124420221 is a wasteful number, since it uses less digits than its factorization.

4124420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139522.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 4124420221 is about 64221.6491613225. The cubic root of 4124420221 is about 1603.6920236573.

Adding to 4124420221 its reverse (1220244214), we get a palindrome (5344664435).

The spelling of 4124420221 in words is "four billion, one hundred twenty-four million, four hundred twenty thousand, two hundred twenty-one".