42213221221 has 8 divisors (see below), whose sum is σ = 43421535360. Its totient is φ = 41017830528.

The previous prime is 42213221213. The next prime is 42213221243. The reversal of 42213221221 is 12212231224.

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 42213221221 - 2³ = 42213221213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42213221192 and 42213221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42213221261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3224236 + ... + 3237301.

It is an arithmetic number, because the mean of its divisors is an integer number (5427691920).

Almost surely, 2^42213221221 is an apocalyptic number.

It is an amenable number.

42213221221 is a deficient number, since it is larger than the sum of its proper divisors (1208314139).

42213221221 is a wasteful number, since it uses less digits than its factorization.

42213221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6461723.

The product of its digits is 768, while the sum is 22.

Adding to 42213221221 its reverse (12212231224), we get a palindrome (54425452445).

The spelling of 42213221221 in words is "forty-two billion, two hundred thirteen million, two hundred twenty-one thousand, two hundred twenty-one".