4134423443221 has 4 divisors (see below), whose sum is σ = 4377624822252. Its totient is φ = 3891222064192.

The previous prime is 4134423443141. The next prime is 4134423443261. The reversal of 4134423443221 is 1223443244314.

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 3799166231025 + 335257212196 = 1949145^2 + 579014^2 .

It is a cyclic number.

It is not a de Polignac number, because 4134423443221 - 2¹¹ = 4134423441173 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 (4134423443261) 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, 121600689490 + ... + 121600689523.

It is an arithmetic number, because the mean of its divisors is an integer number (1094406205563).

Almost surely, 2^{4134423443221} is an apocalyptic number.

It is an amenable number.

4134423443221 is a deficient number, since it is larger than the sum of its proper divisors (243201379031).

4134423443221 is a wasteful number, since it uses less digits than its factorization.

4134423443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243201379030.

The product of its digits is 221184, while the sum is 37.

Adding to 4134423443221 its reverse (1223443244314), we get a palindrome (5357866687535).

The spelling of 4134423443221 in words is "four trillion, one hundred thirty-four billion, four hundred twenty-three million, four hundred forty-three thousand, two hundred twenty-one".