4424430120421 has 4 divisors (see below), whose sum is σ = 4439530564812. Its totient is φ = 4409329676032.

The previous prime is 4424430120377. The next prime is 4424430120497. The reversal of 4424430120421 is 1240210344244.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4281630024100 + 142800096321 = 2069210^2 + 377889^2 .

It is a cyclic number.

It is not a de Polignac number, because 4424430120421 - 2⁹ = 4424430119909 is a prime.

It is a super-2 number, since 2×4424430120421² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4424430120221) 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, 7550221756 + ... + 7550222341.

It is an arithmetic number, because the mean of its divisors is an integer number (1109882641203).

Almost surely, 2^{4424430120421} is an apocalyptic number.

It is an amenable number.

4424430120421 is a deficient number, since it is larger than the sum of its proper divisors (15100444391).

4424430120421 is a wasteful number, since it uses less digits than its factorization.

4424430120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15100444390.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 4424430120421 its reverse (1240210344244), we get a palindrome (5664640464665).

The spelling of 4424430120421 in words is "four trillion, four hundred twenty-four billion, four hundred thirty million, one hundred twenty thousand, four hundred twenty-one".