42222402105221 has 4 divisors (see below), whose sum is σ = 45470279190252. Its totient is φ = 38974525020192.

The previous prime is 42222402105199. The next prime is 42222402105223. The reversal of 42222402105221 is 12250120422224.

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 28484156073025 + 13738246032196 = 5337055^2 + 3706514^2 .

It is a cyclic number.

It is not a de Polignac number, because 42222402105221 - 2¹⁸ = 42222401843077 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 (42222402105223) 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, 1623938542496 + ... + 1623938542521.

It is an arithmetic number, because the mean of its divisors is an integer number (11367569797563).

Almost surely, 2^{42222402105221} is an apocalyptic number.

It is an amenable number.

42222402105221 is a deficient number, since it is larger than the sum of its proper divisors (3247877085031).

42222402105221 is a wasteful number, since it uses less digits than its factorization.

42222402105221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247877085030.

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 42222402105221 its reverse (12250120422224), we get a palindrome (54472522527445).

The spelling of 42222402105221 in words is "forty-two trillion, two hundred twenty-two billion, four hundred two million, one hundred five thousand, two hundred twenty-one".