42242214221 has 4 divisors (see below), whose sum is σ = 42342552444. Its totient is φ = 42141876000.

The previous prime is 42242214199. The next prime is 42242214239. The reversal of 42242214221 is 12241224224.

42242214221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8804068900 + 33438145321 = 93830^2 + 182861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42242214221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42242214241) 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, 50168480 + ... + 50169321.

It is an arithmetic number, because the mean of its divisors is an integer number (10585638111).

Almost surely, 2^42242214221 is an apocalyptic number.

It is an amenable number.

42242214221 is a deficient number, since it is larger than the sum of its proper divisors (100338223).

42242214221 is a wasteful number, since it uses less digits than its factorization.

42242214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100338222.

The product of its digits is 4096, while the sum is 26.

Adding to 42242214221 its reverse (12241224224), we get a palindrome (54483438445).

The spelling of 42242214221 in words is "forty-two billion, two hundred forty-two million, two hundred fourteen thousand, two hundred twenty-one".