4220235421 has 4 divisors (see below), whose sum is σ = 4310027712. Its totient is φ = 4130443132.

The previous prime is 4220235419. The next prime is 4220235433. The reversal of 4220235421 is 1245320224.

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 4220235421 - 2¹ = 4220235419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220235451) 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, 44896075 + ... + 44896168.

It is an arithmetic number, because the mean of its divisors is an integer number (1077506928).

Almost surely, 2^4220235421 is an apocalyptic number.

It is an amenable number.

4220235421 is a deficient number, since it is larger than the sum of its proper divisors (89792291).

4220235421 is an equidigital number, since it uses as much as digits as its factorization.

4220235421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89792290.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 4220235421 is about 64963.3390536539. The cubic root of 4220235421 is about 1616.0156392723.

Adding to 4220235421 its reverse (1245320224), we get a palindrome (5465555645).

The spelling of 4220235421 in words is "four billion, two hundred twenty million, two hundred thirty-five thousand, four hundred twenty-one".