4223220421 has 16 divisors (see below), whose sum is σ = 5096848000. Its totient is φ = 3418391808.

The previous prime is 4223220409. The next prime is 4223220451. The reversal of 4223220421 is 1240223224.

It is a cyclic number.

It is not a de Polignac number, because 4223220421 - 2²³ = 4214831813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4223220392 and 4223220401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4223220451) 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, 9096 + ... + 92353.

It is an arithmetic number, because the mean of its divisors is an integer number (318553000).

Almost surely, 2^4223220421 is an apocalyptic number.

It is an amenable number.

4223220421 is a deficient number, since it is larger than the sum of its proper divisors (873627579).

4223220421 is a wasteful number, since it uses less digits than its factorization.

4223220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101788.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4223220421 is about 64986.3094889993. The cubic root of 4223220421 is about 1616.3965556071.

Adding to 4223220421 its reverse (1240223224), we get a palindrome (5463443645).

The spelling of 4223220421 in words is "four billion, two hundred twenty-three million, two hundred twenty thousand, four hundred twenty-one".