42124444221 has 8 divisors (see below), whose sum is σ = 56389695264. Its totient is φ = 27971078000.

The previous prime is 42124444169. The next prime is 42124444231. The reversal of 42124444221 is 12244442124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42124444221 - 2³⁵ = 7764705853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42124444231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27970326 + ... + 27971831.

It is an arithmetic number, because the mean of its divisors is an integer number (7048711908).

Almost surely, 2^42124444221 is an apocalyptic number.

It is an amenable number.

42124444221 is a deficient number, since it is larger than the sum of its proper divisors (14265251043).

42124444221 is a wasteful number, since it uses less digits than its factorization.

42124444221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55942411.

The product of its digits is 16384, while the sum is 30.

Adding to 42124444221 its reverse (12244442124), we get a palindrome (54368886345).

The spelling of 42124444221 in words is "forty-two billion, one hundred twenty-four million, four hundred forty-four thousand, two hundred twenty-one".